化工学报2023，Vol.74Issue(10)：4063-4073,11.DOI:10.11949/0438-1157.20230870
湿颗粒倾斜碰撞恢复系数的直接数值模拟
Direct numerical simulation of restitution coefficient during oblique collision of wet particles
摘要
Abstract
By coupling VOF(volume of fluid)and the overset meshing method,direct numerical simulation of"particle-particle"oblique collisions with surface-attached droplets is carried out,and the evolution law of the liquid bridge,particle motion,and collision restitution coefficient are obtained during the collision process.Under different collision angles,the effect of liquid on the collision restitution coefficient is the most significant for the normal collision.With the increase in liquid viscosity,the normal and total restitution coefficients decrease,while the tangential restitution coefficient slightly increases.With the increase in collision velocity,the normal and total restitution coefficients increase,while the tangential restitution coefficient decreases.Under the oblique collision,the rotation of particles promotes particle separation,and the liquid bridge can generate shear action,converting part of the tangential kinetic energy into normal kinetic energy.This present study can provide basic data for developing a simplified model of wet particle collisions.关键词
流化床/湿颗粒碰撞/液桥/碰撞恢复系数/数值模拟Key words
fluidized-bed/wet particle collision/liquid bridge/collision restitution coefficient/numerical simulation分类
化学化工引用本文复制引用
刘道银,范志恒,马吉亮,陈晓平..湿颗粒倾斜碰撞恢复系数的直接数值模拟[J].化工学报,2023,74(10):4063-4073,11.基金项目
国家自然科学基金项目(51976037) （51976037）
