<論説>建物・煙突周辺気流の流動拡散解析 : 2 次元乱流モデルを用いて

概要

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The purpose of this paper is to present the flows with diffusion processes of air pollutant in generalized coordinate system. The model is based on the two dimensional unsteady Reynolds equations for the mean flow and the diffusion equation for transport processes of air pollution. Turbulence closure model is obtained by a two-eqation model consisting of transport equations for the turbulence kinetic energy (k) and its dissipation rate (ε). To handle arbitrary geometries, the boundary-fitted curvilinear coordinates are used to generate a coodinate surface coincident with the rigid boundary in the physical plain. The solution procedure for the convective terms in the momentum equations, diffusion equation and turbulence transport equations uses spatially third-order accurate upwind QUICK control-volume algorithm that is extended to generalized coordinates. The computations for the turbulent flows and diffusion processes around a building with chimney are made with a computer code named kεGGQ2D/diff. The results are in fine agreement with the experiments in velocity profiles and air pollutant distributions.
四日市大学の論文
1991-03-25