[wouter]

Hello sahm,
I think I fixed the problem, please check. It is a quick fix, so I will be improving on the performance.
Map1,map2 and map3 are still empty, I think that is ok.

Hope this helps
Wouter

[sahm]

Hello Wouter

I am getting an error that says Killed! don't know what's happening.

+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--
in comsol version 5 no parameters 
 reading 4398 GeomEntityIndices
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--
finished reading type "edg"
===============================================================
reading type: "quad"
number of Nodes per Element 4
number of Elements 79432
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
in comsol version 5 no parameters 
 reading 79432 GeomEntityIndices
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
finished reading type "quad"
===============================================================
reading type: "hex"
number of Nodes per Element 8
number of Elements 465944
+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
in comsol version 5 no parameters 
 reading 465944 GeomEntityIndices
+---------+---------+---------+---------+---------+---------+-----Killed

Could you please try running the case with the coarse mesh file? Thanks.

[wouter]

Hello Sahm,
attached the run of comsolToFoam on the coarse mesh. For me it gives a result.
I had to delete a number of lines because the file was too large.
comsolToFoam Tunnel_coarse.mphtxt report1.html
checkMesh is attached as well
Killed is not something from my program
Hope this helps
wouter

[sahm]

Hi Wouter,

Could you tell me how you ran the code? I mean you say you deleted some lines, which lines were deleted? I am trying to run the code again (after a restart to clean the memory)

Thanks,
SAHM.

[wouter]

Hello Sahm,
the command is in the previous mail

comsolToFoam Tunnel_coarse.mphtxt report1.html >comsolToFoam.log
checkMesh >> comsolToFoam.log

The lines I deleted were in the log file, if you open it, it says:
:
: lines deleted
:

hope his helps
Wouter

[sahm]

OK, I noticed it now. I thought you deleted some lines from the comsol mesh file.
I will see what happens.

Thanks for your help. I hope your code helps others as well.

[wouter]

Hello Sahm,
just run the simple version: attached a picture from parafoam

Best regards,
Wouter

[sahm]

Hi Wouter,

Thanks a lot for your help, after some manual editing it seems like the case is working finally.

Here are the troubles I ran into while I was trying to make my case work:

1. The internal faces that were defined as a boundary (inside the boundary file), I had to delete them.
2. I had two periodic boundaries in the Comsol File. Inside Comsol I had to define them as one boundary condition which included both faces. But for OpenFOAM, I have to have them separate and define them as cyclic boundary conditions. I did that, but the program gave an error that the connected faces should have similar areas, which means the numbering order of the faces did not match, so I used cyclicAMI boundary condition.
3. CyclicAMI also requires similar areas or bounding boxes for both boundaries. I noticed a problem that one of the boundaries were starting from a value like -9.98987e-15. This value basically should be zero. I opened up the points file and noticed that there are many points that had their coordinates as w.xyz e-15 and all these numbers should be zero. Don't know if comsol has generated such numbers or the conversion has created them (I guess it's comsol), but I had to manually set them all to zero.

After working on the U and P files seems like icofoam is working which means the case will work for other solvers as well. I might have to use parallel computing though since my mesh is too big.

Again, thanks for your help.

[wouter]

Hello Sahm,
Thanks for the feedback, I will put this in my source file, so it won't get lost.
I do not think I can change anything in my program to improve on these points, they are all in comsol.
I can check the cyclic boundary condition in openFoam from a periodic boundary in comsol, I never used them so I do not know if I succeed.

Best regards,
Wouter

[mariofcordova]

Hello foamers,

I have tried to convert my comsol file in OpenFoam mesh but I am not sure how to source the code. I tried to source it but a weird error appear.

Here it is:

"make: *** No rule to make target 'Make/linux64GccDPInt32Opt/comsolToFoam8.C.dep', needed by 'Make/linux64GccDPInt32Opt/comsolToFoam8.o'. Stop."

In addition, a folder called "linux64GccDPInt32Opt" is created. I will appreciate a lot if you can help me to solve this issue.

Regards
Mario

[wouter]

hello Mari,
It is a long time ago. Did you download the make directory?

Did you run wmake?
maybe you have to edit the files to reflect the latest c file

look at the complete thread for more information.
Please note that this is for an old version of OF and Comsol



Hope this helps
Regards,
Wouter

[zyliao]

Originally Posted by wouter

Hello aujamal20,
Last year I have written a program loosly based on cfx4toFoam that can read a comsol 4.2a mphtxt or mphbin file and convert it into an Openfoam mesh. To get the boundary names you need to make a reportfile (.html) in comsol, minimum is geometry, mesh units I think ( a full report is the best thing).
It can read 3D and 2D and axial meshes.
There is a warning that the boundaries are all going to the default, this is not true but I did not know how to prevent this warning.
The program is not finished, domains are all merged to one domain.
The boundary information for the 0 directory is not yet collected.
This project of mine is stopped because I do not have access to Comsol anymore, so I do not know if it works with newer Comsol versions.

http://www.filedropper.com/comsoltofoamtar

just unpack files in a source directory (eg OpenFOAM/user-xxx/run/applications/utilities/mesh/conversion/comsolToFoam )
run wmake.
(NB. Because I did not plan to publish this I did not use the OpenFoam conventions for programming. I am very old school so part of it is c not c++ ).
Hope you can use this, let me know if you can improve the program.
Best regards
Wouter

Hi Wouter,

I wonder if you have updated your program so that it can suitable for comsol 6.0 & OpenFOAM 6.0?
Thank you!

[wouter]

hello zyliao,
As said in the post I do not have access to Comsol anymore, so no updates


best
Wouter

[Ryuzaki]

hello dear foamers,
Is there any way to convert comsol mesh to openfoam?