"Flowers" in COMSOL Multiphysics
1 Attachment(s)
Hello everybody,
I'm new here, I'm a Ph.D student in a Spanish University. I work in fuel cell modelling and use COMSOL Multyphisics. There is an issue that is killing me: I obtain real strange results when solving certain kind of problems. Does anybody know why? Did you ever have something like this? Can anybody help me? Please!! Thank you very much. |
That's usually artifacts and they are due to a poor grid.
If you can be more specific on your problem.... So try refining the mesh. |
First of all, thank you very much for your help, symkimon.
I suspected it was the mesh which was the "guilty" of this problem. I obtain this results when modelling a serpentine fuel cell. Specifically this artifacts appear only in the electric potential of the conductive media DC application mode I use (and consequently in all the variables related to it). I tried to refine the mesh, as you said, but I always get the message "out of memory" while solving again. I have to use a direct solver (UMFPACK, PARDISO or SPOOLES), otherwise the system doesn't converge. Sometimes SPOOLES lets me have a more refined mesh, but it's still insufficient, as "flowers" keep on appearing. Are you sure that my problem is due to the mesh? Do you think that if I use a more powerful CPU I will overcome this? I use now an AMD Sempron Processor 3200+ at 1.81 GHz, 3.00 GB RAM. Thank you very much again for your kindness. |
Can you send me the file? I got a monster PC here to give it a go. Is it COMSOL 3.5?
|
All times are GMT -4. The time now is 07:45. |