角柱流れに対する境界条件と差分スキームに関する数値的研究

概要

論文の詳細を見る
The artificial boundary conditions and the discretization of convection terms are important problems in the numerical simulations of fluid flows. In this work, three kinds of higher-order upwind difference schemes with a fourth-order numerical viscosity term and three outflow boundary conditions at a downstream boundary are examined for the two-dimensional incompressible flow passing a square cylinder. We use a finite difference method. The numerical algorithm is the MAC method with non-staggered mesh. Calculations have been performed for six cases and the Reynolds number is 100. Comparing the results of three schemes, we show that flow parameters are influenced by the magnitude of the numerical viscosity term. All three outflow conditions affect the pressure field near the downstream boundary.
一般社団法人日本機械学会の論文
1993-02-25