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2D Axisymmetric Weak form PDE

Posted May 31, 2015, 6:41 a.m. EDT 2 Replies

Behrouz Raftari Tangabi
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Dear COMSOL users,

I want to solve a system of PDE's using Weak form PDE in 2D axisymmetric system.
My question is: should I multiply the weak expressions by 2*pi*r or not?

Thank you very much in advance.
Best regards,
Behrouz
2 Replies Last Post Jun 1, 2015, 11:49 a.m. EDT
Rong Xu
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Posted: 10 years ago May 31, 2015, 9:19 p.m. EDT

Hi,

I think you need to multiply the weak expressions by 2*pi*r. This is because the derivative operation in Cylinder coordinate is a little different with that in cartesian coordinate. There were many discussion about it, you can search those discussion for detail explanation.

Best,
Rong
Hi, I think you need to multiply the weak expressions by 2*pi*r. This is because the derivative operation in Cylinder coordinate is a little different with that in cartesian coordinate. There were many discussion about it, you can search those discussion for detail explanation. Best, Rong
Behrouz Raftari Tangabi
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Posted: 10 years ago Jun 1, 2015, 11:49 a.m. EDT
Dear Rong,
Many thanks.
Behrouz

Dear Rong, Many thanks. Behrouz

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