Software FAQs

Solid Edge

CFD

SUMMARY

FloEFD performs the first convergence check upon reaching 1 travel.  The term “travel” is an internal calculation terminology and from a user-standpoint can be imagined as the point of time when beginning from the defined inlet(s) a fluid particle passes the outlet(s) for the first time.

The term “Iterations per 1 travel” is a calculus estimate of how many iterations FloEFD needs to perform to reach this first travel.

DETAILS

Sometimes it could be of interest to manually perform such an estimate.

What is the formula with which the value for the term “Iterations per 1 travel” is calculated by FloEFD?

The number of iterations needed to reach 1 travel is calculated by FloEFD using the formula:

Formula for number of iterations per 1 travel

with (total number of mesh cells) = number of solid cells + number of fluid cells + number of partial cells

Categories: CFD, FloEFD

SUMMARY

Let us assume you upgraded FloEFD to a new Version (e.g. from Version 15.0 to Version 17.0). Is it possible to move or copy the user-modified Engineering Database (possibly containing many user-defined entries) to this new Version of FloEFD in order to be used and accessed?

There are two ways to achieve this:

Method A: Explicit export and re-import of single items or subnodes of the dedicated *.xml Engineering Database file (this method is preferable if the target database has already been modified as well)

  1. Open the Engineering Database from inside the old version of FloEFD (in this example let us assume Version 15 to be the old version).
  2. Select the item you want export.  This could be either a single item or a subnode.  We will use a Combustible Mixture as example here.

Single Item:

Entire subnode:

3. Save the *.xml file to some location on your hard drive (where you’ll find it).

4. Open the Engineering Database from inside the new version of FloEFD (in this example let us assume Version 17 to be the new version).

5. Open the File Menu and select Import.  Select the *.xml file you exported under step 3 and confirm your choice.

6. The import filter will take care of the kind of database entry and will create a new subfolder in the associated user-defined subnode with the name of the imported *.xml file:

7. If this folder is unwanted, you may move the items from the subfolder by dragging and dropping to the subnode directly and delete the subfolder afterwards.

8. Do not forget to save the changes.

Method B: Moving the database of an old version into a new, fresh and clean installation of a new version:

1. Locate the old database.  It should be located in the ProgramData folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE15\CHEMBASEUSER2.XML

2. Simply copy this file to the new version folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE17\CHEMBASEUSER2.XML3. Restart FloEFD

3. Restart FloEFD.

Categories: CFD, FloEFD

SUMMARY

Warning in the calculation window saying A vortex crosses the pressure opening warning.

DETAILS

At a pressure boundary you have some recirculation at the edge of the domain.  This can lead to incorrect results.

During simulations a warning can pop up saying a vortex is crossing a pressure opening, this means, you have some recirculation at the edge of the domain. This can lead to incorrect results.

There are a few ways this can be fixed in FloEFD:

Extend the domain size to calculate all the recirculation properly.  This allows FloEFD to resolve the recirculation region and more accurate results will be seen with the expected flow characteristics:

It may be possible that the mesh is too coarse to capture all the effects of the flow in that region, using a local mesh region will allow just this region to be refined:

There may be some flow and overall physics which show time-dependent effects which can result in the goals oscillating and causing this warning.  In this case, you may try to do a time-dependent analysis to further observe these effects and to obtain direct physical time-dependent results.

It may be that for the geometry and boundary conditions, this behavior is correct and further investigation is required.

Categories: CFD, FloEFD

SUMMARY

Inactive parts still work in FloEFD

DETAILS

“Inactive” for Solid Edge means lightweight (not suppress), i.e. some information is unloaded from memory for easier work with a model, but “inactive” component is still presented in the model.

Please go to Component Control to clear the check box at the right of the components’ name in the list to disable parts or subassemblies.

Categories: CFD, FloEFD

SUMMARY

Restarting FloEFD or even the computer does not reset the “Calculating” state.

DETAILS

To clear the “Calculating” status, delete Runinfo.dat in the project’s numbered folder and restart FloEFD:

Categories: CFD, FloEFD

SUMMARY

The Transient Explorer is a fast way to explore FloEFD’s results on cut plots and surface plots after a transient calculation.

It requires much less time and disk space to be created than a classic animation.

DETAILS

Once the time-dependent option has been specified in the General Settings (or the Wizard), it is possible to activate the Transient Explorer saving in the Calculation Control Options window:

The data to set are:

  1. The start and the periodicity of the saving (this saving can be done at each iteration as it will not require too many resources)
  2. The variables to be saved (only those variables will be available for Transient Explorer at the end of the calculation)

Note that the Transient Explorer CANNOT be activated during the solving in the Calculation Control Options from the Solver Monitor window.

Once the calculation is finished, you can activate the Transient Explorer from the Results section either by right-clicking on Results or from the FloEFD toolbars:

The list of available features will be shortened as some objects like Flow Trajectories cannot be shown using the Transient Explorer.  A slider bar will appear in the Graphical Area and it can be used to navigate through the transient results on the displayed plots:

A movie can be exported from the Animation feature.

Categories: CFD, FloEFD

SUMMARY

Is there a possibility to save parts/assemblies with their associated project definitions and properties such as material definitions, heat sources, boundary conditions, mesh settings, engineering goals etc. which are attached to single parts or assemblies to a library for later use in another project?

How do I access project settings that have been saved into parts/assemblies in other projects once I’ve inserted such a part/assembly?

How do I add component properties from one model into another, different one?  How do I transfer properties?

DETAILS

  1. Open the part or assembly (which you intend to save in a library location for later use) in FloEFD.
  2. Create one or more FloEFD project(s) on this part or assembly.  This does not need to be meaningful geometry. Exception: If you are dealing with complete assemblies, the parts should be aligned properly.  The number of projects depends on the number of “property sets”: for each set there’s one project.
  3. Assign all required properties/boundary conditions to all parts/assemblies in the project or all projects, respectively.
  4. Save all.
  5. Now you can move or copy the parts and assemblies (with the attached FloEFD project properties) as you like on your hard drive for later use.
  6. Now, when you are in a new FloEFD project (e.g. let us assume you now opened a new model and created a new FloEFD project for it), you can insert the existing parts or assemblies (saved under step 5).
  7. Right-click on the Project tree and choose Customize Tree to activate and make the corresponding functionality From Components visible in the pre-processing section of the FloEFD tree.
  8. Activate “From Components”
  9. The item “From Components” appears in the project tree. Right-click on it and select “Add from Components”.

10. A new pane appears at the bottom showing all parts and assemblies for which FloEFD project properties have been detected:

11. Select the FloEFD project from which you want to import the properties from the list of projects:

A green checkmark marks the success of the operation:

12. Then click on the “Add” icon located in the top-left corner of the pane.  All properties will now be added to the new main FloEFD project:

Please note that also some default properties made in General Settings are imported into the “From Components” subtree.

Categories: CFD, FloEFD

The customer still needs to download the standalone version of FloEFD. Confirm that there is a license attached to the Mentor Graphics license management software: Mentor Graphics has a separate LMTools acting. Download the software through the Siemens or Mentor Graphics website.

Categories: CFD, FloEFD

Use the “Software License Change Notification” document and fill it out with customer information so Mentor can issue a new license to the customer. This assumes that the customer bought the FloEFD license through the Mentor Graphics site (or vendor) instead of through Siemens. If the license was bought through Siemens, use the Siemens license process.

Categories: CFD, FloEFD

FloEFD

SUMMARY

FloEFD performs the first convergence check upon reaching 1 travel.  The term “travel” is an internal calculation terminology and from a user-standpoint can be imagined as the point of time when beginning from the defined inlet(s) a fluid particle passes the outlet(s) for the first time.

The term “Iterations per 1 travel” is a calculus estimate of how many iterations FloEFD needs to perform to reach this first travel.

DETAILS

Sometimes it could be of interest to manually perform such an estimate.

What is the formula with which the value for the term “Iterations per 1 travel” is calculated by FloEFD?

The number of iterations needed to reach 1 travel is calculated by FloEFD using the formula:

Formula for number of iterations per 1 travel

with (total number of mesh cells) = number of solid cells + number of fluid cells + number of partial cells

Categories: CFD, FloEFD

SUMMARY

Let us assume you upgraded FloEFD to a new Version (e.g. from Version 15.0 to Version 17.0). Is it possible to move or copy the user-modified Engineering Database (possibly containing many user-defined entries) to this new Version of FloEFD in order to be used and accessed?

There are two ways to achieve this:

Method A: Explicit export and re-import of single items or subnodes of the dedicated *.xml Engineering Database file (this method is preferable if the target database has already been modified as well)

  1. Open the Engineering Database from inside the old version of FloEFD (in this example let us assume Version 15 to be the old version).
  2. Select the item you want export.  This could be either a single item or a subnode.  We will use a Combustible Mixture as example here.

Single Item:

Entire subnode:

3. Save the *.xml file to some location on your hard drive (where you’ll find it).

4. Open the Engineering Database from inside the new version of FloEFD (in this example let us assume Version 17 to be the new version).

5. Open the File Menu and select Import.  Select the *.xml file you exported under step 3 and confirm your choice.

6. The import filter will take care of the kind of database entry and will create a new subfolder in the associated user-defined subnode with the name of the imported *.xml file:

7. If this folder is unwanted, you may move the items from the subfolder by dragging and dropping to the subnode directly and delete the subfolder afterwards.

8. Do not forget to save the changes.

Method B: Moving the database of an old version into a new, fresh and clean installation of a new version:

1. Locate the old database.  It should be located in the ProgramData folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE15\CHEMBASEUSER2.XML

2. Simply copy this file to the new version folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE17\CHEMBASEUSER2.XML3. Restart FloEFD

3. Restart FloEFD.

Categories: CFD, FloEFD

SUMMARY

Warning in the calculation window saying A vortex crosses the pressure opening warning.

DETAILS

At a pressure boundary you have some recirculation at the edge of the domain.  This can lead to incorrect results.

During simulations a warning can pop up saying a vortex is crossing a pressure opening, this means, you have some recirculation at the edge of the domain. This can lead to incorrect results.

There are a few ways this can be fixed in FloEFD:

Extend the domain size to calculate all the recirculation properly.  This allows FloEFD to resolve the recirculation region and more accurate results will be seen with the expected flow characteristics:

It may be possible that the mesh is too coarse to capture all the effects of the flow in that region, using a local mesh region will allow just this region to be refined:

There may be some flow and overall physics which show time-dependent effects which can result in the goals oscillating and causing this warning.  In this case, you may try to do a time-dependent analysis to further observe these effects and to obtain direct physical time-dependent results.

It may be that for the geometry and boundary conditions, this behavior is correct and further investigation is required.

Categories: CFD, FloEFD

SUMMARY

Inactive parts still work in FloEFD

DETAILS

“Inactive” for Solid Edge means lightweight (not suppress), i.e. some information is unloaded from memory for easier work with a model, but “inactive” component is still presented in the model.

Please go to Component Control to clear the check box at the right of the components’ name in the list to disable parts or subassemblies.

Categories: CFD, FloEFD

SUMMARY

Restarting FloEFD or even the computer does not reset the “Calculating” state.

DETAILS

To clear the “Calculating” status, delete Runinfo.dat in the project’s numbered folder and restart FloEFD:

Categories: CFD, FloEFD

SUMMARY

The Transient Explorer is a fast way to explore FloEFD’s results on cut plots and surface plots after a transient calculation.

It requires much less time and disk space to be created than a classic animation.

DETAILS

Once the time-dependent option has been specified in the General Settings (or the Wizard), it is possible to activate the Transient Explorer saving in the Calculation Control Options window:

The data to set are:

  1. The start and the periodicity of the saving (this saving can be done at each iteration as it will not require too many resources)
  2. The variables to be saved (only those variables will be available for Transient Explorer at the end of the calculation)

Note that the Transient Explorer CANNOT be activated during the solving in the Calculation Control Options from the Solver Monitor window.

Once the calculation is finished, you can activate the Transient Explorer from the Results section either by right-clicking on Results or from the FloEFD toolbars:

The list of available features will be shortened as some objects like Flow Trajectories cannot be shown using the Transient Explorer.  A slider bar will appear in the Graphical Area and it can be used to navigate through the transient results on the displayed plots:

A movie can be exported from the Animation feature.

Categories: CFD, FloEFD

SUMMARY

Is there a possibility to save parts/assemblies with their associated project definitions and properties such as material definitions, heat sources, boundary conditions, mesh settings, engineering goals etc. which are attached to single parts or assemblies to a library for later use in another project?

How do I access project settings that have been saved into parts/assemblies in other projects once I’ve inserted such a part/assembly?

How do I add component properties from one model into another, different one?  How do I transfer properties?

DETAILS

  1. Open the part or assembly (which you intend to save in a library location for later use) in FloEFD.
  2. Create one or more FloEFD project(s) on this part or assembly.  This does not need to be meaningful geometry. Exception: If you are dealing with complete assemblies, the parts should be aligned properly.  The number of projects depends on the number of “property sets”: for each set there’s one project.
  3. Assign all required properties/boundary conditions to all parts/assemblies in the project or all projects, respectively.
  4. Save all.
  5. Now you can move or copy the parts and assemblies (with the attached FloEFD project properties) as you like on your hard drive for later use.
  6. Now, when you are in a new FloEFD project (e.g. let us assume you now opened a new model and created a new FloEFD project for it), you can insert the existing parts or assemblies (saved under step 5).
  7. Right-click on the Project tree and choose Customize Tree to activate and make the corresponding functionality From Components visible in the pre-processing section of the FloEFD tree.
  8. Activate “From Components”
  9. The item “From Components” appears in the project tree. Right-click on it and select “Add from Components”.

10. A new pane appears at the bottom showing all parts and assemblies for which FloEFD project properties have been detected:

11. Select the FloEFD project from which you want to import the properties from the list of projects:

A green checkmark marks the success of the operation:

12. Then click on the “Add” icon located in the top-left corner of the pane.  All properties will now be added to the new main FloEFD project:

Please note that also some default properties made in General Settings are imported into the “From Components” subtree.

Categories: CFD, FloEFD

The customer still needs to download the standalone version of FloEFD. Confirm that there is a license attached to the Mentor Graphics license management software: Mentor Graphics has a separate LMTools acting. Download the software through the Siemens or Mentor Graphics website.

Categories: CFD, FloEFD

Use the “Software License Change Notification” document and fill it out with customer information so Mentor can issue a new license to the customer. This assumes that the customer bought the FloEFD license through the Mentor Graphics site (or vendor) instead of through Siemens. If the license was bought through Siemens, use the Siemens license process.

Categories: CFD, FloEFD

Load More

NX CAD

CFD

SUMMARY

FloEFD performs the first convergence check upon reaching 1 travel.  The term “travel” is an internal calculation terminology and from a user-standpoint can be imagined as the point of time when beginning from the defined inlet(s) a fluid particle passes the outlet(s) for the first time.

The term “Iterations per 1 travel” is a calculus estimate of how many iterations FloEFD needs to perform to reach this first travel.

DETAILS

Sometimes it could be of interest to manually perform such an estimate.

What is the formula with which the value for the term “Iterations per 1 travel” is calculated by FloEFD?

The number of iterations needed to reach 1 travel is calculated by FloEFD using the formula:

Formula for number of iterations per 1 travel

with (total number of mesh cells) = number of solid cells + number of fluid cells + number of partial cells

Categories: CFD, FloEFD

SUMMARY

Let us assume you upgraded FloEFD to a new Version (e.g. from Version 15.0 to Version 17.0). Is it possible to move or copy the user-modified Engineering Database (possibly containing many user-defined entries) to this new Version of FloEFD in order to be used and accessed?

There are two ways to achieve this:

Method A: Explicit export and re-import of single items or subnodes of the dedicated *.xml Engineering Database file (this method is preferable if the target database has already been modified as well)

  1. Open the Engineering Database from inside the old version of FloEFD (in this example let us assume Version 15 to be the old version).
  2. Select the item you want export.  This could be either a single item or a subnode.  We will use a Combustible Mixture as example here.

Single Item:

Entire subnode:

3. Save the *.xml file to some location on your hard drive (where you’ll find it).

4. Open the Engineering Database from inside the new version of FloEFD (in this example let us assume Version 17 to be the new version).

5. Open the File Menu and select Import.  Select the *.xml file you exported under step 3 and confirm your choice.

6. The import filter will take care of the kind of database entry and will create a new subfolder in the associated user-defined subnode with the name of the imported *.xml file:

7. If this folder is unwanted, you may move the items from the subfolder by dragging and dropping to the subnode directly and delete the subfolder afterwards.

8. Do not forget to save the changes.

Method B: Moving the database of an old version into a new, fresh and clean installation of a new version:

1. Locate the old database.  It should be located in the ProgramData folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE15\CHEMBASEUSER2.XML

2. Simply copy this file to the new version folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE17\CHEMBASEUSER2.XML3. Restart FloEFD

3. Restart FloEFD.

Categories: CFD, FloEFD

SUMMARY

Warning in the calculation window saying A vortex crosses the pressure opening warning.

DETAILS

At a pressure boundary you have some recirculation at the edge of the domain.  This can lead to incorrect results.

During simulations a warning can pop up saying a vortex is crossing a pressure opening, this means, you have some recirculation at the edge of the domain. This can lead to incorrect results.

There are a few ways this can be fixed in FloEFD:

Extend the domain size to calculate all the recirculation properly.  This allows FloEFD to resolve the recirculation region and more accurate results will be seen with the expected flow characteristics:

It may be possible that the mesh is too coarse to capture all the effects of the flow in that region, using a local mesh region will allow just this region to be refined:

There may be some flow and overall physics which show time-dependent effects which can result in the goals oscillating and causing this warning.  In this case, you may try to do a time-dependent analysis to further observe these effects and to obtain direct physical time-dependent results.

It may be that for the geometry and boundary conditions, this behavior is correct and further investigation is required.

Categories: CFD, FloEFD

SUMMARY

Inactive parts still work in FloEFD

DETAILS

“Inactive” for Solid Edge means lightweight (not suppress), i.e. some information is unloaded from memory for easier work with a model, but “inactive” component is still presented in the model.

Please go to Component Control to clear the check box at the right of the components’ name in the list to disable parts or subassemblies.

Categories: CFD, FloEFD

SUMMARY

Restarting FloEFD or even the computer does not reset the “Calculating” state.

DETAILS

To clear the “Calculating” status, delete Runinfo.dat in the project’s numbered folder and restart FloEFD:

Categories: CFD, FloEFD

SUMMARY

The Transient Explorer is a fast way to explore FloEFD’s results on cut plots and surface plots after a transient calculation.

It requires much less time and disk space to be created than a classic animation.

DETAILS

Once the time-dependent option has been specified in the General Settings (or the Wizard), it is possible to activate the Transient Explorer saving in the Calculation Control Options window:

The data to set are:

  1. The start and the periodicity of the saving (this saving can be done at each iteration as it will not require too many resources)
  2. The variables to be saved (only those variables will be available for Transient Explorer at the end of the calculation)

Note that the Transient Explorer CANNOT be activated during the solving in the Calculation Control Options from the Solver Monitor window.

Once the calculation is finished, you can activate the Transient Explorer from the Results section either by right-clicking on Results or from the FloEFD toolbars:

The list of available features will be shortened as some objects like Flow Trajectories cannot be shown using the Transient Explorer.  A slider bar will appear in the Graphical Area and it can be used to navigate through the transient results on the displayed plots:

A movie can be exported from the Animation feature.

Categories: CFD, FloEFD

SUMMARY

Is there a possibility to save parts/assemblies with their associated project definitions and properties such as material definitions, heat sources, boundary conditions, mesh settings, engineering goals etc. which are attached to single parts or assemblies to a library for later use in another project?

How do I access project settings that have been saved into parts/assemblies in other projects once I’ve inserted such a part/assembly?

How do I add component properties from one model into another, different one?  How do I transfer properties?

DETAILS

  1. Open the part or assembly (which you intend to save in a library location for later use) in FloEFD.
  2. Create one or more FloEFD project(s) on this part or assembly.  This does not need to be meaningful geometry. Exception: If you are dealing with complete assemblies, the parts should be aligned properly.  The number of projects depends on the number of “property sets”: for each set there’s one project.
  3. Assign all required properties/boundary conditions to all parts/assemblies in the project or all projects, respectively.
  4. Save all.
  5. Now you can move or copy the parts and assemblies (with the attached FloEFD project properties) as you like on your hard drive for later use.
  6. Now, when you are in a new FloEFD project (e.g. let us assume you now opened a new model and created a new FloEFD project for it), you can insert the existing parts or assemblies (saved under step 5).
  7. Right-click on the Project tree and choose Customize Tree to activate and make the corresponding functionality From Components visible in the pre-processing section of the FloEFD tree.
  8. Activate “From Components”
  9. The item “From Components” appears in the project tree. Right-click on it and select “Add from Components”.

10. A new pane appears at the bottom showing all parts and assemblies for which FloEFD project properties have been detected:

11. Select the FloEFD project from which you want to import the properties from the list of projects:

A green checkmark marks the success of the operation:

12. Then click on the “Add” icon located in the top-left corner of the pane.  All properties will now be added to the new main FloEFD project:

Please note that also some default properties made in General Settings are imported into the “From Components” subtree.

Categories: CFD, FloEFD

The customer still needs to download the standalone version of FloEFD. Confirm that there is a license attached to the Mentor Graphics license management software: Mentor Graphics has a separate LMTools acting. Download the software through the Siemens or Mentor Graphics website.

Categories: CFD, FloEFD

Use the “Software License Change Notification” document and fill it out with customer information so Mentor can issue a new license to the customer. This assumes that the customer bought the FloEFD license through the Mentor Graphics site (or vendor) instead of through Siemens. If the license was bought through Siemens, use the Siemens license process.

Categories: CFD, FloEFD

FloEFD

SUMMARY

FloEFD performs the first convergence check upon reaching 1 travel.  The term “travel” is an internal calculation terminology and from a user-standpoint can be imagined as the point of time when beginning from the defined inlet(s) a fluid particle passes the outlet(s) for the first time.

The term “Iterations per 1 travel” is a calculus estimate of how many iterations FloEFD needs to perform to reach this first travel.

DETAILS

Sometimes it could be of interest to manually perform such an estimate.

What is the formula with which the value for the term “Iterations per 1 travel” is calculated by FloEFD?

The number of iterations needed to reach 1 travel is calculated by FloEFD using the formula:

Formula for number of iterations per 1 travel

with (total number of mesh cells) = number of solid cells + number of fluid cells + number of partial cells

Categories: CFD, FloEFD

SUMMARY

Let us assume you upgraded FloEFD to a new Version (e.g. from Version 15.0 to Version 17.0). Is it possible to move or copy the user-modified Engineering Database (possibly containing many user-defined entries) to this new Version of FloEFD in order to be used and accessed?

There are two ways to achieve this:

Method A: Explicit export and re-import of single items or subnodes of the dedicated *.xml Engineering Database file (this method is preferable if the target database has already been modified as well)

  1. Open the Engineering Database from inside the old version of FloEFD (in this example let us assume Version 15 to be the old version).
  2. Select the item you want export.  This could be either a single item or a subnode.  We will use a Combustible Mixture as example here.

Single Item:

Entire subnode:

3. Save the *.xml file to some location on your hard drive (where you’ll find it).

4. Open the Engineering Database from inside the new version of FloEFD (in this example let us assume Version 17 to be the new version).

5. Open the File Menu and select Import.  Select the *.xml file you exported under step 3 and confirm your choice.

6. The import filter will take care of the kind of database entry and will create a new subfolder in the associated user-defined subnode with the name of the imported *.xml file:

7. If this folder is unwanted, you may move the items from the subfolder by dragging and dropping to the subnode directly and delete the subfolder afterwards.

8. Do not forget to save the changes.

Method B: Moving the database of an old version into a new, fresh and clean installation of a new version:

1. Locate the old database.  It should be located in the ProgramData folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE15\CHEMBASEUSER2.XML

2. Simply copy this file to the new version folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE17\CHEMBASEUSER2.XML3. Restart FloEFD

3. Restart FloEFD.

Categories: CFD, FloEFD

SUMMARY

Warning in the calculation window saying A vortex crosses the pressure opening warning.

DETAILS

At a pressure boundary you have some recirculation at the edge of the domain.  This can lead to incorrect results.

During simulations a warning can pop up saying a vortex is crossing a pressure opening, this means, you have some recirculation at the edge of the domain. This can lead to incorrect results.

There are a few ways this can be fixed in FloEFD:

Extend the domain size to calculate all the recirculation properly.  This allows FloEFD to resolve the recirculation region and more accurate results will be seen with the expected flow characteristics:

It may be possible that the mesh is too coarse to capture all the effects of the flow in that region, using a local mesh region will allow just this region to be refined:

There may be some flow and overall physics which show time-dependent effects which can result in the goals oscillating and causing this warning.  In this case, you may try to do a time-dependent analysis to further observe these effects and to obtain direct physical time-dependent results.

It may be that for the geometry and boundary conditions, this behavior is correct and further investigation is required.

Categories: CFD, FloEFD

SUMMARY

Inactive parts still work in FloEFD

DETAILS

“Inactive” for Solid Edge means lightweight (not suppress), i.e. some information is unloaded from memory for easier work with a model, but “inactive” component is still presented in the model.

Please go to Component Control to clear the check box at the right of the components’ name in the list to disable parts or subassemblies.

Categories: CFD, FloEFD

SUMMARY

Restarting FloEFD or even the computer does not reset the “Calculating” state.

DETAILS

To clear the “Calculating” status, delete Runinfo.dat in the project’s numbered folder and restart FloEFD:

Categories: CFD, FloEFD

SUMMARY

The Transient Explorer is a fast way to explore FloEFD’s results on cut plots and surface plots after a transient calculation.

It requires much less time and disk space to be created than a classic animation.

DETAILS

Once the time-dependent option has been specified in the General Settings (or the Wizard), it is possible to activate the Transient Explorer saving in the Calculation Control Options window:

The data to set are:

  1. The start and the periodicity of the saving (this saving can be done at each iteration as it will not require too many resources)
  2. The variables to be saved (only those variables will be available for Transient Explorer at the end of the calculation)

Note that the Transient Explorer CANNOT be activated during the solving in the Calculation Control Options from the Solver Monitor window.

Once the calculation is finished, you can activate the Transient Explorer from the Results section either by right-clicking on Results or from the FloEFD toolbars:

The list of available features will be shortened as some objects like Flow Trajectories cannot be shown using the Transient Explorer.  A slider bar will appear in the Graphical Area and it can be used to navigate through the transient results on the displayed plots:

A movie can be exported from the Animation feature.

Categories: CFD, FloEFD

SUMMARY

Is there a possibility to save parts/assemblies with their associated project definitions and properties such as material definitions, heat sources, boundary conditions, mesh settings, engineering goals etc. which are attached to single parts or assemblies to a library for later use in another project?

How do I access project settings that have been saved into parts/assemblies in other projects once I’ve inserted such a part/assembly?

How do I add component properties from one model into another, different one?  How do I transfer properties?

DETAILS

  1. Open the part or assembly (which you intend to save in a library location for later use) in FloEFD.
  2. Create one or more FloEFD project(s) on this part or assembly.  This does not need to be meaningful geometry. Exception: If you are dealing with complete assemblies, the parts should be aligned properly.  The number of projects depends on the number of “property sets”: for each set there’s one project.
  3. Assign all required properties/boundary conditions to all parts/assemblies in the project or all projects, respectively.
  4. Save all.
  5. Now you can move or copy the parts and assemblies (with the attached FloEFD project properties) as you like on your hard drive for later use.
  6. Now, when you are in a new FloEFD project (e.g. let us assume you now opened a new model and created a new FloEFD project for it), you can insert the existing parts or assemblies (saved under step 5).
  7. Right-click on the Project tree and choose Customize Tree to activate and make the corresponding functionality From Components visible in the pre-processing section of the FloEFD tree.
  8. Activate “From Components”
  9. The item “From Components” appears in the project tree. Right-click on it and select “Add from Components”.

10. A new pane appears at the bottom showing all parts and assemblies for which FloEFD project properties have been detected:

11. Select the FloEFD project from which you want to import the properties from the list of projects:

A green checkmark marks the success of the operation:

12. Then click on the “Add” icon located in the top-left corner of the pane.  All properties will now be added to the new main FloEFD project:

Please note that also some default properties made in General Settings are imported into the “From Components” subtree.

Categories: CFD, FloEFD

The customer still needs to download the standalone version of FloEFD. Confirm that there is a license attached to the Mentor Graphics license management software: Mentor Graphics has a separate LMTools acting. Download the software through the Siemens or Mentor Graphics website.

Categories: CFD, FloEFD

Use the “Software License Change Notification” document and fill it out with customer information so Mentor can issue a new license to the customer. This assumes that the customer bought the FloEFD license through the Mentor Graphics site (or vendor) instead of through Siemens. If the license was bought through Siemens, use the Siemens license process.

Categories: CFD, FloEFD

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Simcenter 3D

CFD

SUMMARY

FloEFD performs the first convergence check upon reaching 1 travel.  The term “travel” is an internal calculation terminology and from a user-standpoint can be imagined as the point of time when beginning from the defined inlet(s) a fluid particle passes the outlet(s) for the first time.

The term “Iterations per 1 travel” is a calculus estimate of how many iterations FloEFD needs to perform to reach this first travel.

DETAILS

Sometimes it could be of interest to manually perform such an estimate.

What is the formula with which the value for the term “Iterations per 1 travel” is calculated by FloEFD?

The number of iterations needed to reach 1 travel is calculated by FloEFD using the formula:

Formula for number of iterations per 1 travel

with (total number of mesh cells) = number of solid cells + number of fluid cells + number of partial cells

Categories: CFD, FloEFD

SUMMARY

Let us assume you upgraded FloEFD to a new Version (e.g. from Version 15.0 to Version 17.0). Is it possible to move or copy the user-modified Engineering Database (possibly containing many user-defined entries) to this new Version of FloEFD in order to be used and accessed?

There are two ways to achieve this:

Method A: Explicit export and re-import of single items or subnodes of the dedicated *.xml Engineering Database file (this method is preferable if the target database has already been modified as well)

  1. Open the Engineering Database from inside the old version of FloEFD (in this example let us assume Version 15 to be the old version).
  2. Select the item you want export.  This could be either a single item or a subnode.  We will use a Combustible Mixture as example here.

Single Item:

Entire subnode:

3. Save the *.xml file to some location on your hard drive (where you’ll find it).

4. Open the Engineering Database from inside the new version of FloEFD (in this example let us assume Version 17 to be the new version).

5. Open the File Menu and select Import.  Select the *.xml file you exported under step 3 and confirm your choice.

6. The import filter will take care of the kind of database entry and will create a new subfolder in the associated user-defined subnode with the name of the imported *.xml file:

7. If this folder is unwanted, you may move the items from the subfolder by dragging and dropping to the subnode directly and delete the subfolder afterwards.

8. Do not forget to save the changes.

Method B: Moving the database of an old version into a new, fresh and clean installation of a new version:

1. Locate the old database.  It should be located in the ProgramData folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE15\CHEMBASEUSER2.XML

2. Simply copy this file to the new version folder, e.g.: C:\ProgramData\MentorGraphics\FloEFD FE17\CHEMBASEUSER2.XML3. Restart FloEFD

3. Restart FloEFD.

Categories: CFD, FloEFD

SUMMARY

Warning in the calculation window saying A vortex crosses the pressure opening warning.

DETAILS

At a pressure boundary you have some recirculation at the edge of the domain.  This can lead to incorrect results.

During simulations a warning can pop up saying a vortex is crossing a pressure opening, this means, you have some recirculation at the edge of the domain. This can lead to incorrect results.

There are a few ways this can be fixed in FloEFD:

Extend the domain size to calculate all the recirculation properly.  This allows FloEFD to resolve the recirculation region and more accurate results will be seen with the expected flow characteristics:

It may be possible that the mesh is too coarse to capture all the effects of the flow in that region, using a local mesh region will allow just this region to be refined:

There may be some flow and overall physics which show time-dependent effects which can result in the goals oscillating and causing this warning.  In this case, you may try to do a time-dependent analysis to further observe these effects and to obtain direct physical time-dependent results.

It may be that for the geometry and boundary conditions, this behavior is correct and further investigation is required.

Categories: CFD, FloEFD

SUMMARY

Inactive parts still work in FloEFD

DETAILS

“Inactive” for Solid Edge means lightweight (not suppress), i.e. some information is unloaded from memory for easier work with a model, but “inactive” component is still presented in the model.

Please go to Component Control to clear the check box at the right of the components’ name in the list to disable parts or subassemblies.

Categories: CFD, FloEFD

SUMMARY

Restarting FloEFD or even the computer does not reset the “Calculating” state.

DETAILS

To clear the “Calculating” status, delete Runinfo.dat in the project’s numbered folder and restart FloEFD:

Categories: CFD, FloEFD

SUMMARY

The Transient Explorer is a fast way to explore FloEFD’s results on cut plots and surface plots after a transient calculation.

It requires much less time and disk space to be created than a classic animation.

DETAILS

Once the time-dependent option has been specified in the General Settings (or the Wizard), it is possible to activate the Transient Explorer saving in the Calculation Control Options window:

The data to set are:

  1. The start and the periodicity of the saving (this saving can be done at each iteration as it will not require too many resources)
  2. The variables to be saved (only those variables will be available for Transient Explorer at the end of the calculation)

Note that the Transient Explorer CANNOT be activated during the solving in the Calculation Control Options from the Solver Monitor window.

Once the calculation is finished, you can activate the Transient Explorer from the Results section either by right-clicking on Results or from the FloEFD toolbars:

The list of available features will be shortened as some objects like Flow Trajectories cannot be shown using the Transient Explorer.  A slider bar will appear in the Graphical Area and it can be used to navigate through the transient results on the displayed plots:

A movie can be exported from the Animation feature.

Categories: CFD, FloEFD

SUMMARY

Is there a possibility to save parts/assemblies with their associated project definitions and properties such as material definitions, heat sources, boundary conditions, mesh settings, engineering goals etc. which are attached to single parts or assemblies to a library for later use in another project?

How do I access project settings that have been saved into parts/assemblies in other projects once I’ve inserted such a part/assembly?

How do I add component properties from one model into another, different one?  How do I transfer properties?

DETAILS

  1. Open the part or assembly (which you intend to save in a library location for later use) in FloEFD.
  2. Create one or more FloEFD project(s) on this part or assembly.  This does not need to be meaningful geometry. Exception: If you are dealing with complete assemblies, the parts should be aligned properly.  The number of projects depends on the number of “property sets”: for each set there’s one project.
  3. Assign all required properties/boundary conditions to all parts/assemblies in the project or all projects, respectively.
  4. Save all.
  5. Now you can move or copy the parts and assemblies (with the attached FloEFD project properties) as you like on your hard drive for later use.
  6. Now, when you are in a new FloEFD project (e.g. let us assume you now opened a new model and created a new FloEFD project for it), you can insert the existing parts or assemblies (saved under step 5).
  7. Right-click on the Project tree and choose Customize Tree to activate and make the corresponding functionality From Components visible in the pre-processing section of the FloEFD tree.
  8. Activate “From Components”
  9. The item “From Components” appears in the project tree. Right-click on it and select “Add from Components”.

10. A new pane appears at the bottom showing all parts and assemblies for which FloEFD project properties have been detected:

11. Select the FloEFD project from which you want to import the properties from the list of projects:

A green checkmark marks the success of the operation:

12. Then click on the “Add” icon located in the top-left corner of the pane.  All properties will now be added to the new main FloEFD project: