How to calculate viscous part of aerodynamic coefficients in 3D NS-flow
I appreciate if someone tell me how to callculate forces due to viscous stress tensor in 3D viscous external flow.
Txx Txy Txz
Tyx Tyy Tyz
Tzx Tzy Tzz
I have writen a 3d navier-stokes code and want to calculate aerodynamic forces and CL ,CD, CM by viscous part . and how to calculate Cf, too.
you can find this in any advance fluid mechanics text book (Panton; White), but below is the general method to calculate Force contribution due to viscosity.
Fx = T11 x dAx + T12 x dAy + T13 x dAz
Fy = T21 x dAx + T22 x dAy + T23 x dAz
Fz = T31 x dAx + T32 x dAy + T33 x dAz
viscous stress is given as
where i & j take valeus 1,2,3
to calculated Cf
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