Transform function T.smooth can smooth meshes. This function is also usable in Mesh::tkSmooth of
tkCassiopee. Three algorithms are available: Volume, Scale and Taubin. Volume
tends to smooth mesh cells to have all the same volume, scale tends to keep
the original cell volume while changing the mesh lines and Taubin is an
algorithm that performs negative and positive smoothing, trying to minimally
modify mesh points. Constraints can be imposed when smoothing by providing
explicit curves or surface or by selecting EF (mesh exterior faces
wont move) or SE (sharp edges wont move). Selecting PJ force smoothing to
project on the orginal surface at each smoothing step.
Original and smoothed structured surface mesh on a helicopter fuselage by C. Benoit.
Original and smoothed TRI surface mesh on an airplane.