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Setting the derivative of a dependent variable(equal to zero) and assigning it to a boundary
Posted May 7, 2012, 11:26 AM EDT 1 Reply
I have tried figuring this out with no luck and also posted under this extensive post, regarding this, but received no response: www.comsol.com/community/forums/general/thread/28154/
For example, if I I have a 2D-axisymmetric model which has the electrostatic interface and I want to set the derivative of the voltage(w/r/t r) equal to zero, how do I go about that?
d(mod1.V, r) - should give the derivative of the voltage w/r/t r. Where do I define that in my model?
How do I set this equal to zero? d(mod1.V, r) = 0 - where do I put this?
Can I then assign it to a boundary or domain?
Any tips on what to look into would be greatly appreciated.