Automatic surface and volume mesh generation for roughness-resolved LES of additive-manufacturing heat exchangers
Résumé
In order to quantify the impact on the heat exchanger performances of the wall roughness introduced by additive manufacturing, roughness-resolved Large-Eddy Simulation (RRLES) is a valuable tool. However, representative rough surfaces and highquality body-fitted grids of these surfaces are difficult to generate automatically, which prevents from building parametric RRLES databases that can be used for model development. In this work, a rough surface generator with a fine control on the height distribution in the three space directions is proposed. This tool creates triangulated surfaces that are the input of a parallel body-fitted tetrahedral mesh generator. In this latter, the cell size and its gradient and the element skewness are well controlled enabling their use for high-fidelity LES.
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