液滴撞击单丝铺展特性的数值研究OA北大核心CSTPCD

The phenomenon of droplet impact on a single fiber is widely present in the processing of oil and gas,making the study of the spreading characteristics of droplet impact on a single fiber of significant importance for enhancing the thermal and mass transfer efficiency of chemical engineering equipment.Based on the volume of fluent(VOF)method,a numerical model of droplet impact on a single fiber was established,and the effects of initial velocity,initial diameter,impact eccentricity,and impact angle on the droplet spreading factor were systematically studied.The results indicate that increasing the initial velocity accelerates the growth rate of the spreading factor and extends the duration of its maximum value.Additionally,reducing the initial diameter of the droplet yields a higher spreading factor.Shortening the impact eccentricity facilitates more comprehensive spreading of the droplet,with the optimal spreading effect occurring at an eccentricity within 0.2R.Decreasing the impact angle also promotes more thorough spreading of the droplet,where the spreading factor curve exhibits a spreading transition point at different impact angles.Furthermore,the pressure difference between the center and sides of the liquid film drives the rapid spreading of the droplet until it stops after reaching the maximum spreading length.This study can provide a theoretical reference for the optimization design of chemical engineering equipment containing wire mesh packing.