Numerical Simulation Of Porous Fence Structure Optimization And Study On Dust Particle Trajectory

Recently,dust pollution in the port dock yard has gradually become a problem that can't be ignored.The porous fence is a wind and dust-proof measures commonly used both at home and abroad,and have good protective effect on the dust pollution of the yard.Some research has been done on the conventional upright porous fence,this paper design a new guiding-type porous fence,by folding up the upper plate part of upright porous fence to form the guiding deflector,to improve its wind and dust-proof effect.Using FLUENT to simulate the flow field of porous fence.Firstly,comparing and analyzing the flow characteristics——the wind speed,turbulence intensity,shear stress on the surface of pile behind fence,etc,of porous fences which porosity are 20%~40%.Then obtaining that 25% is the optimal porosity.After that,the numerical simulation of nine different types of guiding-type porous fences are conducted.By comparing the wind speed,turbulent intensity on the surface of pile behind fence,etc.We can obtain every optimal guiding-type porous fence of different porosities.With scheme comparison,the result points out that the 30 L guiding-type porous fence with porosity of 25% is the optimal fence.Finally,the trajectories of dust particles on the surface of pile are simulated by the two-way coupled stochastic track in DPM module.By analyzing the overall shape of particle diffusion?the typical trajectory of single particle,and calculating the particle escape rate,the optimized effect of guiding-type porous fence on the dust suppression can be obtained.