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solving two partial differential equations nonlinear in comsol?

Posted 3 avr. 2015, 10:04 UTC−4 Heat Transfer & Phase Change, Materials, Studies & Solvers Version 4.2 3 Replies

Cong-Truc Vu
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Hi,

I want to solve two pde nonlinear with two variables (please find in the attachment file) with the constants.

For solve, i tried to use the heat equation and PDE (c) in two step:
step 1: solve PDE(c) only
step 2: solve two equations with the step 1 results

Unfortunately, the results weren't changed anything if i change the constants.

Are you see this problem?
3 Replies Last Post 5 avr. 2017, 20:12 UTC−4
Myungwu Woo
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Posted: 10 years ago 3 avr. 2015, 17:11 UTC−4
I am wondering "Density" and "Heat Capacity at constant pressure" of "Heat Transfer in Solids 1" could be any non zero values.

Regards,
I am wondering "Density" and "Heat Capacity at constant pressure" of "Heat Transfer in Solids 1" could be any non zero values. Regards,
Cong-Truc Vu
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Posted: 10 years ago 3 avr. 2015, 18:52 UTC−4
Thanks for your attention, @myungwu woo. Because this is the stationary case, so these values doesn't impact in the solution. Best regards,
Thanks for your attention, @myungwu woo. Because this is the stationary case, so these values doesn't impact in the solution. Best regards,
MdAminul Islam
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Posted: 8 years ago 5 avr. 2017, 20:12 UTC−4
As I am new to comsol I want to ask a question about the simulation you did. Why did you use steps in the solver? I know that without this I can not get any solution but how should I know that I need to put steps to get the solution.

Thanks
As I am new to comsol I want to ask a question about the simulation you did. Why did you use steps in the solver? I know that without this I can not get any solution but how should I know that I need to put steps to get the solution. Thanks

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