New explicit algebraic stress and flux model for active scalar and simulation of shear stratified cylinder wake flow  

作　　者：HUA ZuLin GU Li XING LingHang DAI WenHong 

机构地区：[1]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education,College of Environmental Science&Engineering,Hohai University,Nanjing 210098,China [2]Yangtze River Scientific Research Institute,Wuhan 430010,China [3]Centre for Water and Environment,Queen’s University,Kingston,Ontario,K7L3N6,Canada

出　　处：《Science China(Technological Sciences)》2009年第9期2536-2546,共11页中国科学（技术科学英文版）

基　　金：Supported by the National Nature Science Foundation of China (Grant Nos. 50679019, 50009001);the National Basic Research Program of China ("973" Project) (Grant No. 2008CB418202);the Project of "Six Talent Peak" of Jiangsu Province (08-C);Social Technology Development Foundation of Jiangsu Province (Grant No. BS2006095);the "908" Special Foundation of Jiangsu Province (Grant No. JS-908-02-06)

摘　　要：On the numerical simulation of active scalar,a new explicit algebraic expression on active scalar flux was derived based on Wikstrm,Wallin and Johansson model (aWWJ model). Reynolds stress algebraic expressions were added by a term to account for the buoyancy effect. The new explicit Reynolds stress and active scalar flux model was then established. Governing equations of this model were solved by finite volume method with unstructured grids. The thermal shear stratified cylinder wake flow was computed by this new model. The computational results are in good agreement with laboratorial measurements. This work is the development on modeling of explicit algebraic Reynolds stress and scalar flux,and is also a further modification of the aWWJ model for complex situations such as a shear stratified flow.On the numerical simulation of active scalar, a new explicit algebraic expression on active scalar flux was derived based on Wikstr?m, Wallin and Johansson model (a WWJ model). Reynolds stress algebraic expressions were added by a term to account for the buoyancy effect. The new explicit Reynolds stress and active scalar flux model was then established. Governing equations of this model were solved by finite volume method with unstructured grids. The thermal shear stratified cylinder wake flow was computed by this new model. The computational results are in good agreement with laboratorial measurements. This work is the development on modeling of explicit algebraic Reynolds stress and scalar flux, and is also a further modification of the a WWJ model for complex situations such as a shear stratified flow.

关 键 词：active SCALAR EXPLICIT ALGEBRAIC model SCALAR flux Reynolds stress thermal SHEAR STRATIFIED CYLINDER wake flow numerical simulation 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]