Post-Processing -> Interpolation of cell-centered values to vertex
I am using Tecplot as a post-processor to visualize CFD-solutions which are stored within an _unstructured CGNS_ (cell-centered). Loading the CGNS-file into Tecplot, I noticed that contour-plots of (all) quantities like mach-number etc. are not smooth. (The simulation converged very nicely. Therefore, I believe that it is only a visualization-problem).
1. Could this be a Tecplot-interpolation-problem? Are there fixes available??
2. I thought that the problem might be the data-storage within the CGNS. Maybe the contours become smooth if I transfered the data from the nodes (=cell centeres) to the vertexes???
Has anybody experience with this issue??? Are there free tools available to interpolate the solution from the nodes to the vertexes???
Thanks in advance.
There is a simple methodology to interpolate the data from the cells adjacent to one node: use the inverse of the distances as weights. You can search for the articles of Neal T Frink:
Page 17 formula 3.10
Hope this will help.
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