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ANALYSIS OF A STRATIFIED NATURAL CONVECTION FLOW WITH THE SECOND-MOMENT CLOSURE  

Choi, Seok-Ki (한국원자력연구원)
Kim, Seong-O (한국원자력연구원)
Publication Information
Journal of computational fluids engineering / v.12, no.3, 2007 , pp. 55-61 More about this Journal
Abstract
A computational study on a strongly stratified natural convection is performed with the elliptic blending second-moment closure. The turbulent heat flux is treated by both the algebraic flux model (AFM) and the differential flux model (DFM). Calculations are performed for a turbulent natural convection in a square cavity with conducting top and bottom walls and the calculated results are compared with the available experimental data. The results show that both the AFM and DFM models produce very accurate solutions with the elliptic-blending second-moment closure without invoking any numerical stability problems. These results show that the AFM and DFM models for treating the turbulent heat flux are sufficient for this strongly stratified flow. However, a slight difference between two models is observed for some variables.
Keywords
Second-Moment Turbulence Model; Thermal Stratification; Natural Convection;
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Times Cited By KSCI : 1  (Citation Analysis)
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