ASM, WETモデル, 渦粘性/渦拡散モデルのアプリオリテスト : 非等温室内気流のLESデータベースを用いた乱流モデルの評価

概要

論文の詳細を見る
A priori test using the LES database created by the authors(2001)is carried out in order to evaluate the Algebraic Stress Model(ASM), the WET model and the linear eddy viscosity/diffusivity model. The accuracy and relative performance of various models are carefully examined in the flow field including supply jet, wall shear and impingement. ASM and the WET model reproduce well anisotropy features of Reynolds stresses and turbulent heat fluxes. However, normal stresses of ASM in the impinging region show slight discrepancy from the LES data. It is clarified quantitatively that this discrepancy is caused by the inaccuracy of the modeling pressure-strain term and algebraic approximation for convection and diffusion term. Furthermore, it is concluded that the WET model requires the use of appropriate wall damping function in order to preciously predict wall shear flows.
社団法人日本建築学会の論文
2002-08-30