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derivative boundary condition

Posted 24.07.2012, 18:36 GMT-4 Version 4.3 0 Replies

Padmini Rangamani
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Hello,

I am solving a coupled system of PDes.

Hxx+Hyy=p+2*H+2*H^3
zxx+zyy=H.

z and H are dependent variables. I am solving this on a square with z=0 on all four boundaries and zx=0 on vertical and zy=0 on horizontal. I used the general form of PDEs, wrote the eqns are shown above and used the constraint node to impose the boundary conditions.

My z results make sense, but H is all wrong. Can you help me troubleshoot? I am flummoxed.

Thanks,
Padmini
0 Replies Last Post 24.07.2012, 18:36 GMT-4
COMSOL Moderator

Hello Padmini Rangamani

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