nanoparticles 和凝结的运输在圆形的拐弯与 CFD 的联合被模仿。Taylor 扩大时刻方法(TEMOM ) 被采用与 Brownian 运动学习 nanoparticles 的动力学,基于从数字模拟的流动领域。在现在的模拟的一个充分发达的流动模式与验证模型和计算代码的以前的数字结果相比。它与时间在剖面图增加上为模仿的微粒流动系统,粒子团集中,数字集中,粒子多分散性,吝啬的粒子直径和几何标准差被发现那。在不同时间的粒子团集中的分发独立于起始的粒子尺寸。更多的粒子在拐弯的外部边被集中。凝结在随后的时期比那在起始的舞台起更多的重要作用。雷纳兹数字和起始的粒子尺寸的增加导致粒子数字集中的增加。粒子多分散性,吝啬的粒子直径和几何标准差与减少的雷纳兹数字和起始的粒子尺寸增加。
Transport of nanoparticles and coagulation is simulated with the combination of CFD in a circular bend. The Taylor-expansion moment method(TEMOM)is employed to study dynamics of nanoparticles with Brownian motion,based on the flow field from numerical simulation.A fully developed flow pattern in the present simulation is compared with previous numerical results for validating the model and computational code.It is found that for the simulated particulate flow system,the particle mass concentration,number concentration,particle polydispersity, mean particle diameter and geometric standard deviation over cross-section increase with time.The distribution of particle mass concentration at different time is independent of the initial particle size.More particles are concentrated at outer edge of the bend.Coagulation plays more important role at initial stage than that in the subsequent period.The increase of Reynolds number and initial particle size leads to the increase of particle number concentration.The particle polydispersity,mean particle diameter and geometric standard deviation increase with decreasing Reynolds number and initial particle size.