smoothMesh

OpenFOAM mesh smoothing tool to improve mesh quality.

Warning: Work in progress.

Current restrictions

• Smoothing of internal mesh points only
• Applies centroidal smoothing algorithm with given number of iterations (centroidalIters option)
• Encourages orthogonal side edges on the boundary cell layer (orthogonalBlendingFraction option)
• Developed on OpenFOAM.com v2312

Compilation instructions

. /usr/lib/openfoam/openfoam2312/etc/bashrc
cd smoothMesh/src
wclean
wmake

Command line options

• -centroidalIters specifies the number of smoothing iterations (default 20)
• -maxStepLength is the maximum length for moving a point in one iteration (default 0.01)
• -orthogonalBlendingFraction (Warning: experimental feature!) is the fraction by which the edges touching the boundary faces are forced towards orthogonal direction (default 0.3)
• -qualityControl true (Warning: experimental feature!) enables the point quality criteria, which freezes point to current location if moving the point would decrease the point quality (if variance of edge-edge angles of all faces meeting at the point would increase)

The following parameters are applied to limit squishing of cells near concave features:

• -minEdgeLength defines edge length below which edge points are fully frozen at their current location (default 0.02)
• -maxEdgeLength defines edge length above which edge vertices are fully free to move, without any constraints (default 1.001 * minEdgeLength)

Usage examples

• Parallel run example: mpirun -np 3 smoothMesh -centroidalIters 20 -parallel
• Serial run example: smoothMesh -centroidalIters 20

Getting help and feedback

Please use Github issues section for asking help. If you like this tool, please star this repository in Github!