レイノルズ応力散逸の壁面漸近挙動のモデリング

概要

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The paper considers the modeling of the asymptotic near-wall behavior of the dissipation term in the Reynolds stress transport equation. A new form of dissipation model is proposed. In contrast to conventional near-wall modeling, the present model avoids the use of the wall-normal vector for generality. This model, unlike existing models, reproduces the exact gradient of the dissipation components ε_<11> and ε_<33> at a wall, where the indices 1 and 3 denote the streamwise and spanwise directions, respectively. The model and two representative existing models are evaluated in turbulent plane Poiseuille and Couette-Poiseuille flows with the aid of direct numerical simulation data. It is shown that the present model gives significantly improved dissipation behavior.
一般社団法人日本機械学会の論文
1995-09-25