[cnsidero]

Marco,

We have a distributor in Germany. His name is Uli Fuchs and he can be contacted at:

uli at cfdbertung dot de
www.cfd-beratung.de
+49 7472 282410

Sorry, the software is not free - we offer free evaluations for a short period of time but you should speak to Uli about how he handles new customers.

[su_junwei]

Hi Chris and Hrv

Thanks for the native export utility for OpenFOAM with pointwise.
But I encountered a problem with its wedge shape mesh exporter for axisymmetric application.
In the axis, there are a lot of faces with zero area. yes, there should be with structure grid.
However, how to set the boundary condition. I searched the discussion board and found that an empty patch is preferred for such a situation. For instance
http://www.cfd-online.com/cgi-bin/Op....cgi?126/11122

But I am not that lucky, and got a message below when starting the simulation

This mesh contains patches of type empty but is not 1D or 2D
by virtue of the fact that the number of faces of this
empty patch is not divisible by the number of cells.

From function emptyFvPatchField<type>::updateCoeffs()
in file fields/fvPatchFields/constraint/empty/emptyFvPatchField.C at line 148.

Yes, it is indeed in my case.

why not delete the faces with zero area at axis? Any suggestions for the boundary condition for axis or methods to delete these zero area faces?

The native mesh with pointwise format is attached.



su junwei

[su_junwei]

[su_junwei]

sorry the file is too big. you can download it here
http://www.box.net/shared/0pofg2ah7o

[dkingsley]

I think you need to have a single node at each longitudinal location and create poles along the axis.

Right now your patch is 2x along the axis face of the block and that is where you zero area panels are coming from.

[dkingsley]

Still not used to Pointwise, it looks like you do have a pole in the right place.

[su_junwei]

Yes, Dennis. I did set a pole at axis. That's why there are so many zero-area faces.
It seems that OpenFOAM doesn't like these zero-area faces and blockMesh utility will not generate these zero-area faces for wedge shape.

I made the mesh in gridgen, and then imported into pointwise.

su junwei

[dkingsley]

Try using gridgen and export it as a Fluent grid and use the FluentMeshToFoam and see if the pole behaves correctly. Its not what is ultimately wanted but it might help the Pointwise folks figure out what is wrong.

I routinely use poles in more complicated 3d grids and have not had an issue going through Fluent.

I am taking off for a long weekend or I would try it myelf.

[su_junwei]

Yes, Dennis. I have checked with fluentMeshToFoam with gridgen. It works perfectly.

Thanks, Junwei

[dkingsley]

like I indicated last night I am on the road.

You should log this as a bug on the pointwise website. I have had great response from their customer support over the years.

[hjasak]

Anyone calling my name here? There are things we can do in the converter (eg collapsing pole points just like in blockMesh), but I would rather see this fixed further upstream. Sounds to me like this is a call for Pointwise (David?).

Hrv

[cnsidero]

I will pass this information on to support so they can look at it but it would be good for one of you (Dennis of Su Junwei) to contact support with the details.

-Chris

[cnsidero]

Just to be clear, if you create a mesh with poles in it:

1) using Pointwise and export to OF you get zero area faces

2) make mesh in Gridgen then import into Pointwise and export to OF you get zero area faces

3) make mesh in Gridgen/Pointwise then export to Fluent and convert to OF using fluentMeshToFoam it works

If this is case, it seems to me the fluentMeshToFoam converter is eliminating the zero area faces (the ones on the axis). I believe Fluent (the solver) has a special way of handling cells/faces on poles. I will speak to our developers and get back to you about his.

[cnsidero]

I have spoke to our developers and they are looking into the issue.

[cnsidero]

See the new thread:

http://www.cfd-online.com/Forums/ope...tml#post212740

[su_junwei]

Dear all

It seems that the "volume conditions" in Pointwise doesn't work for OpenFOAM native exporter in Pointwise. That is Pointwise can't export volume zone (cell zone, or face zone etc) with OpenFOAM exporter even though you have set volume conditon for the mesh. Volume conditions in Pointwise works for fluent exporter. Did you encoutered such a problem? Is it a bug or I did't use it correctly ?

Junwei

[jchawner]

Marco:

Evaluation licenses are indeed free and we'd love to have you try it. To learn more about the software I suggest that you contact our sales partner in Germany, CFD Beratung, directly. Their contact information is on our web site's "Contact Us" page.

Best Regards

[hm86]

Hi everyone-

I am trying to create a mesh for Openfoam using an IGS file I imported from Solidworks. I have a turbine in the center and a cylindrical bounding box around it. I created domains for the turbine and cylindrical outer domain but cannot seem to create blocks to export to OpenFoam. Does anyone know how to do this or have any suggestions?

Thanks!

[ebah6]

Dr. Sideroff,

I am using Pointwise to generate meshes for OpenFOAM.
As of now I can export properly fully structured and fully unstructured meshes.
However with a hybrid grid, only the structured faces are exported.
Note: by hybrid I mean that I created a surface with an unstructured mesh and I extrude it in the 3rd dimension.

Can you give me a lead on how to proceed with such hybrid grids.

Thank you for your time and best regards.

Elhadji

[tcarrigan]

Elhadji,

The issue you are reporting was resolved in Pointwise V16.04R4. To resolve the issue, please download the latest version of Pointwise.


Travis