Abstract
The drag prediction accuracy of the current version of the cell-centered grid metric discretization in the edge-based flow solver TAU lags behind the accuracy of the cell-vertex grid metric on highly-skewed unstructured meshes. Inaccurate convective fluxes and gradients contributing to the turbulence sources are identified as the reasons for this accuracy degradation. Alternative approaches for cell-centered discretizations are presented and shown to lead to significant accuracy and robustness improvements. Recommendations are given to improve spatial discretization schemes for the cell-centered grid metric in an edge-based finite volume code.
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Schwöppe, A., Diskin, B. (2013). Accuracy of the Cell-Centered Grid Metric in the DLR TAU-Code. In: Dillmann, A., Heller, G., Kreplin, HP., Nitsche, W., Peltzer, I. (eds) New Results in Numerical and Experimental Fluid Mechanics VIII. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 121. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35680-3_51
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DOI: https://doi.org/10.1007/978-3-642-35680-3_51
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