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中文摘要：
运用L-Y雷诺应力模型及对水面和固壁边界条件进行有效的处理，结合混合有限分析法数值模拟了复式断面明渠二次流流动及污染物的运移，探讨了沿自由水面横向和垂向的浓度及雷诺传质分布规律，分析了二次流对浓度扩散和紊动传输的影响．
英文摘要：
The Launder ＆ Ying algebraic Reynolds stress turbulent model with hybrid finite analytical method is applied to simulate the secondary current and solute transport in the compound channel. The wall function is adopted such that a resultant stream-wise velocity, U, is expressed by a local friction velocity at a first grid point to the wall of the computation domain. The expression for the dissipation rate given by Rodi at a first grid point of the surface is adopted. The distribution of the concentration and Reynolds fluxes along the surface cross and water depth are given. The calculated concentration spreading width is narrower than the measured spreading width, with the peak value smaller than the measured one. For different inlet location, the concentration peak value shows deflection. The secondary current clearly influences the spreading of the tracer concentration and the location of concentration peak, being different from the injection location.
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