高温鉛直加熱壁近傍の自然対流に関する乱流解析 : 密度変化を伴う高浮力流れの数値シミュレーションに関する研究 第3報

Abstract

Natural air convection along a heated vertical plate is numerically simulated and the results are compared with experiments conducted by the present authors. The temperature difference between the plate surface and the ambient air, ΔT, is set at 43℃ and at 404℃. Low - Reynolds number k-ε models with variable density and that of incompressible flow with Boussinesq approximation are used for the simulations. The two variable density models differ in their treatment of density fluctuation. In the case of ΔT=43℃, the results of the three numerical models correspond well to the experimental results and differ little from each other. In the case of ΔT=4Q4℃ there are considerable differences between the results of the three numerical models. A better agreement with the experimental results is found in the models with variable density.