HGA法を用いた三次元非定常衝撃波の数値解析 : 汎用性とメモリの有効利用を考慮した高速流体の解析手法の構築(流体工学,流体機械)

In the present paper, a new method that is called HGA (Hybrid Grid Adaptation) Method is reported. It is very important to generate grids easily around complex objects in recent numerical simulations, in order to use limited computer resources efficiently. In the present paper, the kinds of grid, which have great effect on analysis accuracy and efficiency, are paid attention to. In three-dimensional problems, only Tetrahedron and Hexahedron is usually used. The former, which has an advantage of flexibility, can be applied to complex objects better than the latter. The latter can analyze flow problems more efficiently than the former. Prism, which has flexibility and efficiency, and Pyramid is used. So we used Hybrid Grid (Tetrahedron/Pyramid/Prism/Hexahedron) to take the advantage of both flexibility and efficiency. And we tried to analyze them more efficiently, using HGA Method included AGR (Adaptive Grid Refinement) Method, which obtains higher resolutions by collecting fine grids only in the location where the change of the physical quantity is intense, based on Hybrid Grid.