A Modified k-ε Model for Computation of Flows with Large Streamline Curvature | Zendy

Junlian Yin | Zendy; Dezhong Wang | Zendy; Yulin Wu | Zendy; D. Keith Walters | Zendy

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A Modified k-ε Model for Computation of Flows with Large Streamline Curvature

Author(s) -

Junlian Yin,

Dezhong Wang,

Yulin Wu,

D. Keith Walters

Publication year - 2013

Publication title -

advances in mechanical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 40

eISSN - 1687-8140

pISSN - 1687-8132

DOI - 10.1155/2013/592420

Subject(s) - turbulence modeling , turbulence , curvature , computation , solver , k epsilon turbulence model , rotation (mathematics) , viscosity , k omega turbulence model , mechanics , computational fluid dynamics , large eddy simulation , statistical physics , physics , classical mechanics , mathematics , mathematical optimization , thermodynamics , geometry , algorithm

This paper presents an improved method for inclusion of system rotation and streamline curvature effects into existing two-equation eddy-viscosity turbulence models. A new formulation for calculation of the turbulence viscosity coefficient, which is implemented into the traditional k-ε model with a two-layer near-wall treatment in a commercial computational fluid dynamics solver, is proposed. In contrast to precious model, the modified rotation rate which appears in the formulation for turbulent viscosity coefficient is herein expressed exactly and universally. Thus, it provides an effective alternative for turbulence modeling

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