Turbulence Model Based on the Compressible Navier-Stoke's Equation for Flow in a Suddenly Expanding Pipe.

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  • 急拡大管路内流れにおける圧縮性方程式を基礎とした乱流モデルの検討
  • キュウ カクダイ カンロナイ ナガレ ニ オケル アッシュクセイ ホウテイシキ

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Abstract

The final objective of this study is to find a turbulence model suitable for high-Reynolds-number flow with large separation, which is based on the compressible Navier-Stoke's equation. As the first step in achieving this purpose, Jameson's artificial dissipation, Baldwin-Lomax's zero-equation turbulence model, and Myong-Kasagi's and Chien's K-ε turbulence models were investigated in this paper. The flows in a suddenly expanding pipe were chosen as the test problem. It is demonstrated that Chien's K-ε model is the best one in terms of accuracy and grid independence of the reattachment distance, and in terms of stability of computation.

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