【摘要】 介绍了适用于气固两相流动的气体“拟颗粒”模型．气体被离散为大量气体微团，即“拟颗粒”；发生碰撞的拟颗粒间有相互作用的粘滞力和压力；气体的运动借助拟颗粒的运动状态来描述，气体间及气体与固体颗粒的相互作用由拟颗粒-拟颗粒、拟颗粒-固体颗粒的作用代替．应用该模型模拟了气体绕流单圆柱和双圆柱的现象，分别计算了单圆柱的曳力系数CD和圆柱间的流体动力作用系数k，分析了拟颗粒的大小对CD和k的影响．更多还原

【Abstract】 A novel pseudo-particle model (PPM ) of physical origins applicable to gassolid flow is amplified in this paper. According to this model, continuous gas is divided intoa large number of discrete undeformable pseudthparticles, viscous and pressure forces arisingfrom random molecular motion are introduced into the interaction among pseudo-particles;the behavior of gas is substituted by motion of these pseudo-paxticles, and the interactionsof gas-gas and gas-solid are equivalent to those among pseudo-particles and pseudo-particlersolid particles. Then phenomena of gas flowing around single cylinder and twin cylindersare simulated with this model, and the influence of pseudo-particles size on both drag forcecoefficient CD and wake effect factor k are also studied.更多还原