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Strategic Study of CAE >> 2005, Volume 7, Issue 7

Algebraic-stress Turbulent Model of Planar 2-D Pollutant Convection-Diffusion in Curvilinear Coordinates

1. Zhejiang Institute of Hydraulics & Estuary, Hangzhou 310020, China

2. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, Liaoning 116024, China

3. Institute of Environmental Science, Beijing Normal University, Beijing 100875, China

Funding project:国家自然科学基金资助项目(50379001);国家杰出青年科学基金资助项目(50125924);辽宁省自然科学基金资助项目(20032117) Received: 2004-04-20 Revised: 2004-12-22 Available online: 2005-07-20

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Abstract

The shallow-water equations and pollutant convective-diffusive equation are transformed into curvilinear coordinate system. The anisotropic algebraic-stress turbulent model is introduced to simulate the turbulence items, and algebraic-stress turbulent model of planar 2-D pollutant convection-diffusion in curvilinear coordinates is built. The meandering channel with measured data of concentration in lab is adopted to validate the model. The comparison between the distribution figure of pollutant concentration field calculated through this model and that of the k-ε model shows the model in the paper is superior to k-ε turbulent model in dealing with anisotropy.

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