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Setting of gradient type B.C. in Phoenics

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Old   February 10, 2011, 22:13
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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Old   April 25, 2011, 07:59
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hope for the best.

I have set the gradient type B.C. as follows:

CO as Fixflu and VAL as 0

Seems work good. Any more suggestion? Please let me know.
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Old   May 4, 2011, 08:16
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Alexey Ginevsky
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Quote:
Originally Posted by black_spider View Post
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?
No ground coding is needed.
The zero flux is default boundary condition. Therefore you need not set anything on such bounds. If you want to use non-zero flux on bound then you should set CO=FIXFLU with one of EAST, WEST, SOUTH, NORTH, LOW or HIGH types of patch.
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