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Old   June 4, 2007, 11:01
Default C-Grid Around airfoil
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Noname
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When generating a C grid around the airfoil what boundary condition do we apply along the top and bottom cut.I have not been able to find any information on the implementation of boundary condition along those lines.

Thanks a lot
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Old   June 4, 2007, 12:32
Default Re: C-Grid Around airfoil
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noname
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add two row of halo grid for bottom and top cut and copy value of bottom cut to halo row of top cut and vise versa(we don't have physical boundary in cut and so this boundary is virtual)
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Old   June 4, 2007, 20:43
Default Re: C-Grid Around airfoil
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CH
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Or i believe you can just deal with it directly since there is actually no boundary. u'll 've to modify the cell connection tt's all.

btw, u can look at blazek CFD book

http://www.amazon.com/Computational-.../dp/0080430090
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Old   June 11, 2007, 14:31
Default Re: C-Grid Around airfoil
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Lost in CFD
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Since there are two points for each point (if you get that) on the wake cut. An accepted route to go is simply to use the average of the points on either side of it, i.e.

Q(n=1) = Q(n=2) + Q(n=nmax-1) / 2 Q(n=nmax) = Q(n=1)
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