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Add new class for calculating wall distance

Kilian Weishaupt requested to merge feature/wall-distance into master
  • Add geometry utilities for constructing spheres / bounding spheres / circumspheres (these are acutally not used by the wall distance but might be useful in the future now that they are implemented.)
  • Add closestEntity and distance queries for point and AABB trees
  • Add DistanceField a function-like wrapper around a set of geometries to make distance queries at a given sample point
  • Add WallDistance a class that evaluates discrete distance-to-the-mesh-boundary field at either vertex or element centers


  • better test
  • Maybe use in existing RANS model
  • fix check for UG or ALU in test
  • check parallelism? maybe throw


Edited by Timo Koch

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