Effect of the rolling friction coefficient on particles' deposition morphology on single fibre

The essence of fibrous filtration is gas-solid flow interaction, and the CFD-DEM (Computational Fluid Dynamic coupled Discrete Element Method) coupling method is an effective method to study such problems. However, the rolling friction coefficient is difficult to obtain accurately. To that end, the effect of changing the rolling friction between particles themselves and between particles and fibres has been studied by numerical simulation, and the coordination number and porosity has been calculated after the material deposition. Comparing the results of the simulations with experimental ones, it is found that the rolling friction coefficient between particles affects significantly the deposition morphology of particles on single fibre. On the other hand, the rolling friction coefficient between particles and fibres has a little effect on it.