粘性颗粒在单纤维体上流动特性的模拟方法

Simulation Method Optimization for the Flow Characteristic of the Cohesive Particle Deposited on the Single Fiber

分别采用CFD-DEM耦合、基于EDEM软件的API接口加载曳力模型以及开源软件Open FOAM三种模拟方法对颗粒在单纤维上的沉积特性进行了数值模拟,对比分析了颗粒物的沉积形态、纤维的过滤性能(包括压力损失和过滤效率)和模拟计算成本,结果表明,基于开源软件Open FOAM模拟方法最优,无论是模拟粘性颗粒物在纤维体上的沉积形态和纤维体的过滤性能,还是模拟计算成本都优于其他两种方法;而基于EDEM软件的API接口加载曳力模型的模拟方法无法得到气相参数及压力损失、CFD-DEM耦合的模拟方法由于计算量大应谨慎选取。

TThree simulation methods, i.e., CFD-DEM（Discrete Element Method）coupling, API interface load drag model based on EDEM software and open source software Open FOAM, were used to simulate the deposition characteristics of particles on the single fiber. The particle deposition form, the fiber filtration performance（including the pressure drop and the filtration efficiency） and the calculation cost were compared and analyzed respectively. The results showed that the simulation method based on the open source software Open FOAM was better than the other two methods no matter on simulating the deposition form of the viscous particles on the fiber and the filtration performance, or the calculation cost. In addition, the gas phase parameters and pressure drop could not be obtained by the method of API interface load drag model based on EDEM software, and the CFD-DEM coupling method should be carefully selected due to the large amount of calculation.