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November 8, 2011, 03:34
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Second derivative at wall
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Senior Member
Ivan Flaminio Cozza
Join Date: Mar 2009
Location: Torino, Piemonte, Italia
Posts: 210
Rep Power: 19   |
Hi Foamers,
I need to implement a slip wall b.c. in second order approximation, that reads: U = A + B(Kn)*(dU/dn + d2U/dn2) where U is the velocity at wall, n is the wall-normal direction, A is a constant B(Kn) is a function of the local Knudsen number. Does someone have an idea on how to get the d2U/dn2? Is it implemented in stuff like groovyBc? Thanks in advance, Ivan |
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