物体周り流れのトポロジー最適化における格子幅の影響

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  • Effects of Grid Spacing on Topology Optimization of Flow around an Object

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<p>In topology optimization to minimize the drag force of an object in a uniform flow, the effect of the grid spacing and the Reynolds number on optimal shapes is studied. The optimization solver is implemented in OpenFOAM🄬 and the Level set method is employed to express the boundary between the solid-fluid interface. For validation purposes, the shape optimization of a sphere in a uniform flow is conducted with systematically changing grid resolution and the Reynolds number. It is confirmed that a sphere tends to elongate in the streamwise direction and shrink in the cross-flow plane in order to minimize the projected area. This trend is enhanced with increasing the Reynolds number. Although the overall trend can be confirmed for all the grid resolutions considered, the resultant optimal shapes significantly depend on the grid resolution. Possible reasons for the grid dependency are discussed by analyzing the forward and adjoint fields.</p>

収録刊行物

  • 年次大会

    年次大会 2019 (0), J12111-, 2019

    一般社団法人 日本機械学会

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