Numerical Simulation of Smouldering Combustion of Pine Wood under High-altitude Conditions Based on COMSOL MULTIPHYSICS
To investigate the smouldering characteristics of pine wood in high-altitude forests in the Southwest region of China,in this study a one-dimensional smoldering model of pine wood was established according to the smoldering mechanism by using COMSOL MULTIPHYSICS.The model was first validated using experimental data under normal gravity condition from literature.Subsequently,the influences of altitude on the smouldering characteristics of pine wood were investigated by setting different pressures and oxygen concentrations corresponding to various altitudes of forest regions.The model results showed that the gas flow velocity in smoldering sig-nificantly increased with increasing altitude,and the time to reach the peak decomposition rate was prolonged.This study indicating a substantial correlation between smoldering mass loss and char oxidation rate.The numerical model proposed in this study can predict the smouldering characteristics of pine wood under different altitudes.These findings provide a theoretical basis for preventing and control-ling smouldering wildfires in high-altitude pine forests in the Southwest region of China.
万方数据
维普
