Surface normal in calculating pressure forces -- CFD Online Discussion Forums

May 12, 2020, 07:13	Surface normal in calculating pressure forces	#1
shereez234 Senior Member M Sereez Join Date: Jan 2014 Location: England Posts: 353 Blog Entries: 1 Rep Power: 13	If i have a grid which is rotating around forward(X axis), then how is the surface normal calculated? Code: const surfaceVectorField::Boundary& Sfb = mesh_.Sf().boundaryField(); My inital guess is that the surface vectorField Sfb or pressure on surface is calculated in a fixed reference i.e. inertia reference frame. Is there a way to align the forces to the body axis frame?

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