计算物理 ›› 2006, Vol. 23 ›› Issue (2): 177-183.

• 研究论文 • 上一篇    下一篇

各向异性浮力紊流的显式代数应力模型及其验证

赖锡军1, 王志东2, 汪德爟3   

  1. 1. 中国科学院地理与湖泊研究所湖泊室, 江苏 南京 210008;
    2. 华东船舶工业学院船舶与海洋工程学院, 江苏 镇江 212003;
    3. 河海大学环境学院, 江苏 南京 210098
  • 收稿日期:2004-11-22 修回日期:2005-04-25 出版日期:2006-03-25 发布日期:2006-03-25
  • 作者简介:赖锡军(1977-),男,浙江遂昌,助理研究员,博士,主要从事环境水力学研究.

An Explicit Algebraic Reynolds Stress Model for Anisotropic Buoyant Turbulent Flows

LAI Xi-jun1, WANG Zhi-dong2, WANG De-guan3   

  1. 1. Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
    2. Institute of East-China Ship-building, Zhenjiang 212003, China;
    3. College of Environmental Engineering, Hohai University, Nanjing 210098, China
  • Received:2004-11-22 Revised:2005-04-25 Online:2006-03-25 Published:2006-03-25

摘要: 在Wallin & Johansson的显式代数雷诺应力模型(EARSM)基础上,引入浮力的紊动效应,使该模型能够反映浮力对紊流运动的影响.利用同位网格上的SIMPLEC算法,模拟了T-型连接管内的温度混合流动.与实验资料和DNS计算结果比较表明,提出的模型能够反映各向异性的浮力紊流特征,而且模型在计算进程中显示出良好的数值收敛性能,与涡粘性两方程模型的计算花费相当.

关键词: 浮力流, 紊流模型, 显式代数应力模型, T-型管流

Abstract: An explicit algebraic Reynolds stress model (EARSM) proposed by Wallin & Johansson was extended to simulate anisotropic buoyant turbulent flows. The collocated finite volume method was applied to solve the Navier-Stokes equations and the pressure coupling was treated in the SIMPLEC algorithm. A turbulent thermal mixing in T-junction flows was simulated to validate the model, A comparison with experiments and Fukushima et al's DNS results shows that the present model captures the characteristics of anisotropic buoyant turbulent flows. Meanwhile, the computation shows excellent numerical stability and the computation cost is only slightly higher than that of the eddy-viscosity turbulence model.

Key words: buoyant turbulent flows, turbulence model, explicit algebraic stress model, T-junction flows

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