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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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converting from 2D to 3D

Posted 21.08.2011, 03:01 GMT-4 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 22.08.2011, 04:47 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 22.08.2011, 01:54 GMT-4
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 22.08.2011, 04:47 GMT-4


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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