LBM Simulation on Spacial Distribution and Deposition of Indoor Respirable Particles

摘要

This paper simulates spacial distribution of 1μm particles under conditions of up supply with up return and up supply with side return air forms with air supply velocity (Vas) 0.1m/s,0.5m/s and 1.0m/s in lattice Boltzmann method.Analysis of average particle deposition rate under different simulation conditions is made.Results show that: particle spacial distribution depth in space and the amount of suspended particles gathering in the air return opening under two return air forms both increase with the increasing of Vas.Lower suspended particles amount and higher indoor air quality appear in the air form of up supply with side return at low Vas,but the situation is opposite while high Vas.The average particle deposition rate under two return air forms both increase first then decrease later with the increasing of Vas.