I am trying to simulate the time-dependent problem in Comsol-Simulink. Two variables on every simulation step are entered into the S-function. On every simulation step the Comsol model integrated into the S-function executed and solved through the LiveLink mechanism. In Comsol model I need to use time-dependent solver.
It seems like on every Simulink simulation step, Comsol model in executed and calculated the number of simulation steps specified by the time-dependent solver, while the input variables are constant during this process. As I understand, I have to save somehow the solution of the Comsol model on every simulation step, and this solution should be used as an initial condition for the next step. Could someone help me to understand how to conduct simulation like this correctly. Thank you in advance.
Dear Lurii,
I suggest to you a links and attached files in topics.
-COMSOL Multiphysics Intensive Training - Gamax Laboratory Solutions
gamaxlabsol.com/comsol-training-course-agendas/
-package comsol multiphysics: Topics by Science.gov
https://www.science.gov/.../p/package+comsol+multiphysics.html
-Solving time dependent CFD simulations - 1172 ... - Comsol
https://www.comsol.com/support/knowledgebase/1172/
-Convergence problem in time dependent solver - Comsol
www.comsol.com/community/forums/general/thread/22699/
Best regards
Thank you very much for your suggestions. Will try to figure out how it works. Thank you!
The information in the links, useful but it could not help me much to solve my problem. Maybe someone have practical experience of connecting Comsol model and Simulink?
Could anyone suggest, after running the Comsol simulation by the command: model.sol('sol1').runAll in the Outputs(block) of the level-2 S-function. I have the solution of my model. After that I have to use this solution as an initial condition for the next iteration step. I am trying to solve the solution with function:
U = mphgetu(model)
After that I have to update the S-function states, in the Update(block) of the S-Function with command:
model.sol('sol1').setU(U)
But this scheme does not work correctly.
The solution of this problem for stationary solver is very easy, however the time-dependent problem is much more complicated. The question is still open.
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