气固两相流中颗粒-颗粒随机碰撞新模型

本文提出一种气固两相流中计算颗粒－颗粒碰撞新模型．该模型提出一种碰撞概率新概念，与已有模型相比，新模型对碰撞概率的思考另辟蹊径，由所得公式可以确定影响碰撞概率大小的因素．此外，该模型提出在所研究控制体中选择虚拟颗粒的方法，特别是对虚拟颗粒的粒径、速度和随机数之间提出相关性准则．它弥补了以往模型的缺陷．经过计算，验证了新模型的合理性．

MODELING PARTICLE-TO-PARTICLE INTERACTIONS IN GAS-SOLID FLOWS

A new particle-particle interaction model is set up in the present paper. It first sets up a new collision probability concept, which is much different from the previous models. The probability of inter-particle collision was found to vary with particle radius, velocity and local particle coordination number. Second, the model features a rule. for choosing the size and velocity of a particle by a relationship between the random number and distribution of particle size, particle size and velocity, which has always ignored in previous studies due to its randomness. The good agreement between the predictions and the experimental data showed that the method applies well to non-dilute gas-solid flows.