(817a) Numerical Simulation Investigation On Particle Loading Process of Nano-Fiber Filter

For worsening air pollution，fibrous filter is respected to have higher performance to capture suspended particle in industrial production and life area, so nano-fiber is considered to design next generation filter because of low pressure drop and high particle capture efficiency. In this project, theoretical analysis, numerical simulation and experimental method were used to deeply investigate effect of slip-boundary of nano-fiber on flow filed and particle loading process in single fiber model and nano-fibrous filter model respectively. The Fluent software with User-Defined Function was used for simulation. The Euler – Lagrange method was used to solve flow filed and particles trajectory, particle interface was captured by voxel method and slip-boundary condition was realized by permeable fiber assumption. The particles deposition on single nano-fiber with different mechanism (diffusion, inertia and interception) was compared with normal fiber. In addition, a mathematic model was generated for nano-fibrous filter to describe effect of dust holding capacity (DHC) on subsequent pressure drop and particle capture efficiency. The predicted DHC data of nano-fibrous filter agreed well with experimental value of hand sheet. This research will provide available theoretical analysis and numerical results for design of next generation nano-fiber filter.