Which boundary condition applied at the surface to non dimensionlize the governing equations?(a) V.n = 0(b) V × n = 0(c) V.(V × n) = 0(d) V × (V × n) = 0I got this question in final exam.My question is based upon Mach Number Independence in division Transonic and Hypersonic Flows of Aerodynamics

Which boundary condition applied at the surface to non dimensionlize t

1.	Which boundary condition applied at the surface to non dimensionlize the governing equations?(a) V.n = 0(b) V × n = 0(c) V.(V × n) = 0(d) V × (V × n) = 0I got this question in final exam.My question is based upon Mach Number Independence in division Transonic and Hypersonic Flows of Aerodynamics
Answer» Correct CHOICE is (a) V.n = 0 For explanation: While NON dimensionalising the governing equations for steady INVISCID flow, the boundary condition APPLIED is that the flow of tangent to the surface. This means that if V is the velocity vector and n is the unit normal vector at the surface, then for the flow to be tangent, V.n = 0.

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