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Conductive media DC

Posted Apr 20, 2011, 2:36 a.m. EDT Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 4.1 3 Replies

Hoda Ayati
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Hi,

I would like to solve Laplace equation over a circular geometry. I found out how to solve it by Conductive media DC in version 3.4 however I could not find the Laplace equation in version 4.1.

Would you please help me to find such an equation in the new version.

Thanks,
Hoda
3 Replies Last Post Apr 20, 2011, 11:11 a.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Apr 20, 2011, 3:14 a.m. EDT
Hi

have you checked Mathematics Classical PDE Laplace Equation (lepq) in the physics choices ?

--
Good luck
Ivar
Hi have you checked Mathematics Classical PDE Laplace Equation (lepq) in the physics choices ? -- Good luck Ivar
Hoda Ayati
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Posted: 1 decade ago Apr 20, 2011, 4:53 a.m. EDT
Dear Ivar,

Thank you for your response.

I have used Laplace equation but I would like to apply current in boundaries and measure voltage over the surface by solving Laplace equation.

The equations in Conductive media DC under electromagnetic are exactly what I wanted but I could not find them in the new version.

-?.d(??V-J^e )=dQ_j Domain settings equation
-n.J=J_n Boundary settings equation

I was wondering if you could help me to find such an equation or similar to them.

Regards,
Hoda
Dear Ivar, Thank you for your response. I have used Laplace equation but I would like to apply current in boundaries and measure voltage over the surface by solving Laplace equation. The equations in Conductive media DC under electromagnetic are exactly what I wanted but I could not find them in the new version. -?.d(??V-J^e )=dQ_j Domain settings equation -n.J=J_n Boundary settings equation I was wondering if you could help me to find such an equation or similar to them. Regards, Hoda
Magnus Ringh COMSOL Employee

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Posted: 1 decade ago Apr 20, 2011, 11:11 a.m. EDT
Hi,

The equivalent physics interface in version 4.1 is called Electric Currents.

Best regards,
Magnus Ringh, COMSOL
Hi, The equivalent physics interface in version 4.1 is called Electric Currents. Best regards, Magnus Ringh, COMSOL

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