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http://dx.doi.org/10.3741/JKWRA.2010.43.10.911

A Numerical Model for Wind-Induced Circulation in a Thermally Stratified Flow  

Lee, Jin-Woo (Dept. of Civil and Environ. Engrg., Hanyang University)
Kim, Hyung-Jun (Dept. of Civil and Environ. Engrg., Hanyang University)
Cho, Yong-Sik (Dept. of Civil and Environ. Engrg., Hanyang University)
Publication Information
Journal of Korea Water Resources Association / v.43, no.10, 2010 , pp. 911-920 More about this Journal
Abstract
The closed water bodies, such as reservoirs and lakes, could be contaminated by an inflow of pollutants in the upstream as well as a stratification caused by seasonal natural phenomena. The vertical circulation particularly plays an important role in reduction of environmental pollutants. The factors of the vertical circulation are the temperature, wind, thermal diffusivity and sunlight. The wind is probably the most significant factor among them. Thus, it is necessary to describe the validation and application of a three-dimensional numerical model of wind-induced circulation in a thermally stratified flow. In this paper, a three-dimensional numerical model for the thermally stratified flows is presented. The model is conducted in three steps to calculate the velocity components from the momentum equations in x- and y- axis directions, the elevations from the free surface equation and the temperature from the scalar transport equation. Numerical predictions are compared with available analytical solutions for the sloshing free surface movement in a rectangular basin. The numerical results generally show a reasonable agreement with analytical solutions. And the model is applied to the circulation for the wind induced flow in a thermally stratification. Consequently, the developed model is validated by two verifications and phenomena of the internal flow.
Keywords
TVD scheme; free surface correction; hydrostatic pressure; thermally stratified flow;
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