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Setting of gradient type B.C. in Phoenics

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Old   February 10, 2011, 21:13
Lightbulb Setting of gradient type B.C. in Phoenics
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designer spider
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hi guys, I wanna set gradient type boundary condition in simulation domain. How to do this in Phoenics?

like this: \frac{\partial \Phi}{\partial n}=0

and also such equation as B.C: \nabla (\epsilon \nabla \Phi)=0

Is GROUND coding helpful in these cases?
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