Numerical Simulation of Dust Concentration Distribution in Confined Space

A dust laboratory design scheme is presented for the research on the anti-dust interference ability of laser fuze. An adjustable dust test plane with uniform concentration is formed under laboratory conditions, and then the anti-dust interference ability of laser fuze is quantitatively analyzed. The k-ε turbulent mathematical model and the discrete phase model (DPM) is established, and the dust laboratory is numerically simulated by computatinal fluid dynamcs FLUENT software based on the semi-implicit method of pressure linked equations (SIMPLE) with hybrid difference scheme and co-located grid. The distributions of dust concentration in different cross sections of the computing domain and the trend of concentration over time can be obtained through simulation. The results indicate that the uniform concentration of dust is affected by the wind velocity of the wind inlet and the mass flow rate of the feed inlet, and the uniform concentration grows linearly with the wind velocity while decays exponentially with the flow rate. And the natural wind can speed up the sedimentation speed of dust. © 2020, Editorial Board of Acta Armamentarii. All right reserved.