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Problem with 3D stationary Solver
Posted Oct 10, 2011, 7:02 a.m. EDT 0 Replies
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I'm using Comsol 4.1 in order to simulate a 3D coupling between a gaussian beam (defined by port) and grating. I' have realized model using Stationary Solver, I have created port and finally defined mesh.
On the first time I clicked on Start button, but the answer was zero everywhere and "Number of degrees of freedom solved for: 0 " in LOG file.
I tried to investigate the problem, and I have found on this community that the reason could be an unselected box in "Solver1--> Dependent Variables -->Mod1_E --> "Solve for these field".
I changed the selection by modify the selection of Solver1---> Dependent Variable ---> "Define by study step: Step1: Stationary " in "define by study step: User defined" in order to select the box "solve for this field" in Mod1_E.
After that I solved again the problem with start button. The answer now is:
Failed to find a solution.
System matrix is zero.
Returned solution has not converged.
I think to have correctly defined port and mesh so I cannot understand which is the problem now.
Can anyone help me?
I have attached the file of my simulation without mesh (it is too big)...
Attachments:
Hello Marco Paolo Bolzoni
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