Mapping Algorithm

The mapping of surface displacements given on a CSM grid onto the CFD grid by the mapping task is performed in two steps:

• Shift and/or rotation of the CSM geometry to align it with the CFD geometry (uses moments of inertia, see [2] for details)
• Interpolation of the displacement vectors onto the vertices of the CFD grid

Interpolation Algorithms

The algorithm described in [2] (using a nearest neighbor search among the CSM elements and inverse distance weighting) is available as oldMappingAlgorithm. The current approach applies a subtriangulation of the CSM elements and a bilinear interpolation.