Numerical simulation of adhesion behavior of micro-particle to the duct wall in the gas-solid two phase flow

摘要

This study describes the numerical approach for adhesion behavior of micro-particle to a duct wall in gas-solid two-phase turbulent low in the horizontal duct in order to predict coal ash particles adhesion behavior in the practical furnace. Low Reynolds number k-epsilon 2 equation model was applied for gas flow calculation. Particle trajectories were calculated solving particle momentum equation by Lagrangian method. Particle momentum equation included share- and wall-induced lift forces and rotary lift force. Particle deposition rate and particle relaxation time were imtroduced to estiamte the calculated result. The calculated result shwoed good agreement with the experimetnal results of other researchers.