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Urgent : Convective Boundary Condition

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Old   August 9, 2011, 08:36
Default Urgent : Convective Boundary Condition
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Sayan Sadhu
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hi, In fluent I need to apply convective boundary condition at outlet.
It will be very helpful if anyone can do this udf.

d(phi)/dt + u*d(phi)/dx = 0

((phi)i,n-(Phi)i,n-1)/dt + u*((phi)i,n-(phi)i-1,n)/dx = 0

i= space index, n= time index, u= outlet boundary normal velocity, dx= space step, dt= time step

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Last edited by sayans; August 9, 2011 at 08:42. Reason: equation picture not coming
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