Spurious entropy generation as a mesh quality indicator
We present an a posteriori error sensor for inviscid, compressible flow. The error sensor is based on an analysis of the phenomenon of spurious entropy generation. We apply the estimator to the case of a Cell Vertex discretisation on quadrilaterals. On the basis of the resulting estimates the mesh points are moved using a hybrid equidistribution method known as the LPE method. The modified meshes are shown to be greatly improved, in the sense that pressure loss and spurious entropy generation are reduced. For subcritical flows, drag is also reduced.
KeywordsCompressible Flow Global Error Inviscid Flow Finite Volume Scheme Leibnitz Rule
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