The Value Simulation Of The Filtration Process By Fiber Filter Materials

In this paper, Fluent software has been used to simulate and analyze the liquid filtration filtrated by 2D yarn array, 3D woven fabric and disorder fiber network. Some primarily experiments have been done to test and verify these results.The value simulation and analysis of the filtration process by 2D yarn array: the model of yarn array network has been made to respectively analyze the changes of the particles capture rate and pressure drop which affected by the 3 set models differed in the yarn's diameter and order density. It turned out that increasing the space between yarns, the particles capture rate decreased and when the diameter of yarn increased, the capture rate increased.The value simulation and analysis of the filtration process by 3D woven fabric: woven fabric model has been simplified to construct a woven fabric physical model made by vertical cross yarns. The relationship between particle capture rate and liquid flow rate has been discussed to determined the appropriate initial flow rate as 2m/s. The diameter of the yarn has been selected as 100μm and the differences of particle capture rate and pressure drop of the 5 3D woven fabric models differed in pore rate has been analyzed. Kept the size of the pore as (100×100)μm, then analyzed the changes of the particle capture rate and pressure drop of the 3D woven fabric model when the diameter of yarn is respectively 60μm, 80μm,100μm, 120μm and 150μm.The results showed that when the diameter of yarn was maintained as the same, increasing the size of the pores, the capture rate decreased, and kept the size of pores unchanged, the larger the diameter of yarn was, the higher of the particle capture rate was.The value simulation and analysis of the filtration process by 3D disorder fiber network: 5 3D disorder fiber networks differed in pore rate which was 70%,75%, 80%,85% and 90% have been constructed and the filtrate process of the 3D disorder fiber network which diameter was respectively 20μm, 1μm and 100nm has been simulated. It also discussed the particle capture rate affected by the layers of the fiber network. It showed when the diameter of the 3D disorder network was 20μm, the smallest size of the particle that can be effectively captured was 15μm while the best simulated model was 80% pore rate model. When the diameter was 1μm, the best fiber network was 75% pore rate simulated network while the diameter was 100nm, the size of the particle can reach to Nano-level.It has been proved by experiments that the interception rate between fiber membrane combined by electrostatic spinning PSU fiber which diameter was 1.2μm and 5μm polystyrene particles is consistent with the result of theoretical simulation.