New explicit algebraic stress and flux model for active scalar and simulation of shear stratified cylinder wake flow |
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Authors: | ZuLin Hua Li Gu LingHang Xing and WenHong Dai |
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Affiliation: | (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 |
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Abstract: | 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.
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) and the “908” Special Foundation of Jiangsu Province
(Grant No. JS-908-02-06) |
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Keywords: | active scalar explicit algebraic model scalar flux Reynolds stress thermal shear stratified cylinder wake flow numerical simulation |
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