1449 格子ボルツマン法による多孔体内流動解析のための境界面再構築法の開発(S38-4 混合・界面,S38 マイクロ・ナノフルイズ)

抄録

In this paper, a novel boundary reconstruction scheme for porous media flows is developed utilizing the reinitialization scheme of the level set method. The proposed scheme transfers usual digitally defined step-like boundary data to continuously smooth surface data. It is confirmed that the lattice Boltzmann simulation by the interpolated bounce-back boundary condition with the present scheme well reproduces the drag coefficients of a cylinder and a sphere. The results indicate that the present scheme improves predicition accuracy and it is more insensitive to grid resolutions than the standard scheme.