空間的に発達する流れ場の流出境界条件について

概要

論文の詳細を見る
In calculating spatially developing flow, the outflow boundary condition is very important. The aim of this study is to clarify the optimum outflow boundary condition for spatially developing flow. To achieve this purpose, we examined and compared several outflow boundary conditions. For velocity, the extrapolations of the order from first to sixth were compared; and for pressure, the Neumann condition and the extrapolation using the boundary values Δt before were compared. From these comparisons, we clarified the effect of these boundary conditions on the vortical fields and the pressure fields and the following conclusions were obtained. 1) For velocity, by using the third-order extrapolation, the vorticity reflection can be eliminated. 2) For pressure, by adopting the first-order extrapolation using boundary values Δt before, the pressure fluctuation can be removed.
一般社団法人日本機械学会の論文
1991-10-25