AM06-16-008 差分格子ボルツマン法による圧縮性流体シミュレーションにおける流出境界条件に関する研究(波動・音・衝撃波(2),一般講演)

概要

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In numerical simulation of fluid dynamics, the computational domain has to be truncated from the physical domain. This truncation gives rise to non-physical artificial boundaries. Particularly, acoustically non-reflecting boundary conditions for compressible flow simulation are a prerequisite for the successful aplication of computational fluid dynamics. On the other hand, Finite Difference Lattice Boltzmann Method(FDLBM) has an advantage that the acoustic field can be calculated with high accuracy and less calculation cost than other methods. So we propose non-reflecting boundary conditions for FDLBM. A comparison and analysis of boundary conditions are carried out for some cases. It is shown non-reflecting condition gives good results.
2006-09-05