Abstract We present simulations showing the particulate flows passing through a single membrane pore under a dead-end and constant-pressure condition. We investigate the effects of the rolling friction acting on particles and the particle concentration on the pore clogging phenomena. A decrease in the rolling friction coefficient of particles shifts the clogging position toward the permeate side and decelerates the permeating flux decline. This effect of the rolling friction coefficient decreases with increasing particle concentration. Furthermore, we simulate the permeation of two-component suspensions, which include two types of particles with large and small rolling friction coefficients. The small number of particles with a large friction coefficient drastically accelerate the pore clogging because they first deposit near the pore entrance and trap subsequent particles. This result indicates that particles that are less accumulated on the membrane under a single-component condition may be primary foulants in a multicomponent system.

中文翻译：

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死端恒压过滤条件下颗粒流过膜孔的模拟

摘要 我们模拟了在死端和恒压条件下通过单个膜孔的颗粒流。我们研究了滚动摩擦对颗粒的影响以及颗粒浓度对孔隙堵塞现象的影响。颗粒滚动摩擦系数的降低使堵塞位置向渗透侧移动并减缓渗透通量的下降。滚动摩擦系数的这种影响随着颗粒浓度的增加而减小。此外，我们模拟了双组分悬浮液的渗透，其中包括两种具有大滚动摩擦系数和小滚动摩擦系数的颗粒。具有大摩擦系数的少量颗粒会大大加速孔隙堵塞，因为它们首先沉积在孔隙入口附近并捕获随后的颗粒。该结果表明，在单组分条件下，在膜上积累较少的颗粒可能是多组分系统中的主要污染物。