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heat transfer / convergence problem
Posted 07.12.2012, 03:30 GMT-5 Fluid & Heat, Heat Transfer & Phase Change Version 4.3a 2 Replies
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I have a heat transfer problem where I am trying to solve movements and temperature in oil due to a submerged heat source. It seems that the convergence is a problem. There are several solvers which I tried but not with success.
Is there anybody who can recommend the apropriate solver and parameters for this problem?
Thanks in advance
Kamil
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there are several things to consider when working with natural convection, so I suggest that you use the tutorials in the heat transfer module as a basis. For example circuit board_nat 2d/3 or light bulb.
Also, you are welcome to send the model that you are working with to support@comsol.com, and we will help you out with suggestions.
Note that COMSOL tries to find the optimal solver for your kind of physics. This means that in most cases the convergence problem is not within the solver. It may be due to too coarse mesh, or maybe there does not even exist a stable stationary solution for your model. Working with such highly nonlinear models requires some careful considerations and experience, so I'd be happy to help you out at support@comsol.com
Best regards
Bertil Nistad
COMSOL Norway