A stable, positivity-preserving scheme for cross-diffusion source term in RANS turbulence models: Application to k-ω turbulence models

被引：5

作者：

Mor-Yossef, Y. ^{[1
]}

机构：

[1] Israeli CFD Ctr ISCFDC, Caesarea Ind Pk, IL-3088900 Caesarea, Israel

来源：

COMPUTERS & FLUIDS | 2019年 / 191卷

关键词：

Turbulence model; Cross-diffusion term; Stable scheme; Positivity; TRANSPORT MODEL; EPSILON MODEL; FLOW;

D O I：

10.1016/j.compfluid.2019.104234

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Stabilization measures that are introduced to the numerical treatment of the cross-diffusion term in k-omega turbulence models are presented. Specifically, a new treatment of the full form of the cross-diffusion term that appears in near-wall k-omega turbulence models is presented. Preserving the positivity of the turbulent specific dissipation rate plays a pivotal role in the design of the new scheme. Results obtained from three-dimensional numerical simulations using an unstructured-grid-based flow solver demonstrate the significant improvement compared to conventional schemes. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：13

共 12 条

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