以流体力学理论为基础，通过对颗粒在水溶液中的受力分析，结合早期的阻塞过滤模型和近期的滤饼层过滤模型，建立了一种新的颗粒体系错流过滤过程的数学模拟方法。在该模拟过程中同时考虑了膜孔径和颗粒大小两种分布，并对具有相同平均孔径而孔径分布不同的情形对膜渗透通量的影响进行了模拟。经实验验证，模拟结果与实验值能够较好地吻合。 Based on the theory of fluid mechanics, a new mathematical simulation method for the cross-flow filtration process of granular system was established based on the force analysis of particles in aqueous solution, combined with the early blocking filtration model and the recent filter cake filtration model. In the simulation process, both the membrane pore size and the particle size distribution were taken into account simultaneously. The effects of different pore size distributions with the same average pore size on the membrane permeate flux were simulated. The experimental results show that the simulation results agree well with the experimental values.