Not only convection but also random diffusion of substantial particle and their sediment are considered in the model.
该模型不仅考虑了质点在海水中的对流运动，而且还用大量质点的随机扩散模拟湍扩散过程。
Based on the Finite Volume Methods (FVM), model system is developed to solve the 2d shallow water equation and convection-diffusion equation.
以有限体积法为核心，建立了求解二维浅水方程和对流扩散方程的模型体系。
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