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converting from 2D to 3D

Posted Aug 21, 2011, 3:01 a.m. EDT Parameters, Variables, & Functions Version 4.2 2 Replies

David Segal
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Hi

I have the following question

In a 2D axisymmetric model I apply a volume force which is dependent on r and z and it works fine

Now I wish to insert my 2D model as a cylindrical domain into a 3D model

It seems there is no way to apply the same volume force as I did in the 2D model because the

only options are Fx Fy and Fz and I can't apply the same axisymmetric force that I had in the 2D model

please advise

David
2 Replies Last Post Aug 22, 2011, 4:47 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 Aug 22, 2011, 1:54 a.m. EDT
Hi

what about defining a cylindrical coordinate, or define yourself variables like r = sqrt((x-x0)^2+(y-y0)^2) (if its nicely aligned along x,y,z).

But the COMSOL coordinates system nodes allows you to easily define any orientation

--
Good luck
Ivar
Hi what about defining a cylindrical coordinate, or define yourself variables like r = sqrt((x-x0)^2+(y-y0)^2) (if its nicely aligned along x,y,z). But the COMSOL coordinates system nodes allows you to easily define any orientation -- Good luck Ivar
David Segal
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Posted: 1 decade ago Aug 22, 2011, 4:47 a.m. EDT


Hi Ivar

Thanks for your response.

I can define cylindrical coordinates but I cannot work the entire 3D model in cylindrical coordinates

The volume force node is still in cartesian and so it is impossible to define an axisymmetric force.

David
Hi Ivar Thanks for your response. I can define cylindrical coordinates but I cannot work the entire 3D model in cylindrical coordinates The volume force node is still in cartesian and so it is impossible to define an axisymmetric force. David

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