k-ε乱流モデルに対する新たな提案とその評価 : 第1報,モデルの開発

概要

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After re-examining apparent problems of previous k-εturbulence models, the present authors propose an improved k-εmodel based on the consideration of two length scales, one very near the wall and the other in the fully turbulent region. Main features of the present model are as follows: (1) it does not require any additional terms in the transport equations in order to improve numerical predictions in the wall region and / or to facilitate numerical computation, (2) it gives the physically correct limiting behavior of turbulence quantities such as k,ε, - uv^^^- and f_μas the wall is approached, (3) the function f_μ, usually called a damping factor, is presently called a conversion factor of length scales because of its physical meaning, (4) the present model allows for a direct comparison between the predicted and measuredεin the wall region.
一般社団法人日本機械学会の論文
1988-11-25