Abstract
In this research, a three-dimensional geometric model of knitted cylindrical air filter material is constructed. Due to the isotropy of the three-dimensional structure, a certain cyclic structure is selected for the flow calculation domain in this research. According to the principle of air filter particle testing, the pressure drop of the filter material and the particle collection efficiency are simulated and calculated. Applying ANSYS finite element analysis software, based on Fluent's fluid Lagrangian discrete model, the geometric model is meshed and the particle materials and boundary conditions are set. Air is the continuous phase, and its velocity is set at 0.27 m/s. The jet particles are used as discrete phases to track the particle trajectory in real time. Based on the above conditions, the simulation of the capture efficiency of weft-knitted tubular air filter material for different particle sizes can not only predict and evaluate the filtering efficiency of the knitted tubular air filter material, but also provide a theoretical reference for fluid simulation of the knitted filter material.
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