CATIA-FloEFD-Absturz bei benutzerdefiniertem Material

f-i-t-e · December 16, 2015, 02:44

Hallo all,

when I create in CATIA-FloEFD a new, customized solid material and apply the material to a Body and start the calculation I'll get the error message "Runtime Exception, Click OK to terminate" and CATIA is shut down. The Problem does not occur when applying a predefined material (e.g. stainless steel) via the Wizard to all parts of the assembly. Has anyone an idea? It's kind of urgent. I'm sorry the picture in the appendix is not in english...

Kind regards
f-i-t-e

Boris_M · December 17, 2015, 06:58

Hi Peter,

I'm not sure if the access rights are still necessary for the start of a project but I would check if you have write access to the folder the user defined database for the material is stored. You can find the specified folder in the Catia Options under Tools. There is a FloEFD settings part in the Simulation tools part of the tree on the left and in one of the tabs for FloEFD you should find the folder specified. Sometimes IT doesn't give users access to some folders and it might be the source but I would guess that it would rather crash by the time you try to save the new material in the database.

Another possibility would be that the material properties are not correct. Meaning that you either entered a value that is not ok or forgot something like maximum temperature being 0K or anything like that. If you would show the material parameters I could better tell. You can also try to copy/paste a material that does exist in the pre-defined database into the user-defined database and see if there is also a problem there with the general use of user defined materials.

You mentioned you applied stainless steel to all parts, was that the same that you did with the user defined material?
Reason is that there might be a geometry issue if you specify different materials no matter if user defined or not and the problem is not appearing if you specify the material to all parts (no mater which material).
The reason is that FloEFD splits components that are in contact but have different properties into different entities in the mesher as they have to store different material properties for the solver in their cells and at the contacting faces the solids are split in the cells by using partial cells that can have two or more solid materials in one cell and if that split cannot be done at one of the contacting faces. If you have the same material for all parts there will be no splitting of the cells and all will be one entity with the same property. Such a process is usually done in the stage that your image shows with the "Preparing Model" where the geometry is written out for the mesher.

That is all I can tell from the information you gave.

What version of FloEFD are you using?

Boris

f-i-t-e · December 17, 2015, 07:07

Hello Boris,

I figured out the Problem. The Problem was, that the model was not watertight. There were small gaps between several surfaces. I fixed the Problem and now the model runs through.

Kind regards
f-i-t-e

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December 17, 2015, 06:58		#2
Boris_M Disabled Join Date: Jul 2009 Posts: 616 Rep Power: 23	Hi Peter, I'm not sure if the access rights are still necessary for the start of a project but I would check if you have write access to the folder the user defined database for the material is stored. You can find the specified folder in the Catia Options under Tools. There is a FloEFD settings part in the Simulation tools part of the tree on the left and in one of the tabs for FloEFD you should find the folder specified. Sometimes IT doesn't give users access to some folders and it might be the source but I would guess that it would rather crash by the time you try to save the new material in the database. Another possibility would be that the material properties are not correct. Meaning that you either entered a value that is not ok or forgot something like maximum temperature being 0K or anything like that. If you would show the material parameters I could better tell. You can also try to copy/paste a material that does exist in the pre-defined database into the user-defined database and see if there is also a problem there with the general use of user defined materials. You mentioned you applied stainless steel to all parts, was that the same that you did with the user defined material? Reason is that there might be a geometry issue if you specify different materials no matter if user defined or not and the problem is not appearing if you specify the material to all parts (no mater which material). The reason is that FloEFD splits components that are in contact but have different properties into different entities in the mesher as they have to store different material properties for the solver in their cells and at the contacting faces the solids are split in the cells by using partial cells that can have two or more solid materials in one cell and if that split cannot be done at one of the contacting faces. If you have the same material for all parts there will be no splitting of the cells and all will be one entity with the same property. Such a process is usually done in the stage that your image shows with the "Preparing Model" where the geometry is written out for the mesher. That is all I can tell from the information you gave. What version of FloEFD are you using? Boris

December 17, 2015, 07:07		#3
f-i-t-e New Member peter Join Date: Dec 2015 Posts: 2 Rep Power: 0	Hello Boris, I figured out the Problem. The Problem was, that the model was not watertight. There were small gaps between several surfaces. I fixed the Problem and now the model runs through. Kind regards f-i-t-e