forces and moments
From a cfd solution i get forces F and moments M in a coordinate system. I then rotate them in a new coordinate system whose x axis is aligned with the force vector. I then expect M (along x axis) to be close to 0 (ideally should be 0); but it's NOT. U get a moment around 1% of the norm of M. Is it only due to numerical errors? I have looked at results on different geometries and different solvers, i get this error everywhere.
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