气固两相流DUGKS-Lagrange耦合算法  

A coupled DUGKS-Lagrange method for gas-particle flows

作　　者：梅鲁浩 徐江荣[1] 蔡宏敏 梁宏 王路 MEI Luhao;XU Jiangrong;CAI Hongmin;LIANG Hong;WANG Lu(School of Sciences,Hangzhou Dianzi University,Hangzhou Zhejiang 310018,China)

机构地区：[1]杭州电子科技大学理学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2021年第6期70-75,共6页Journal of Hangzhou Dianzi University：Natural Sciences

摘　　要：离散统一气体动理论算法(Discrete Unified Gas-Kinetic Scheme,DUGKS)比传统动理学方法拥有更丰富的流场时空演化信息,却很少应用于气固两相流领域。基于点源颗粒的介观两相流模型,提出一种新的气固两相流耦合算法,并用于方腔中单颗粒运动及颗粒群扩散的数值模拟。采用DUGKS-Lagrange方法求解气固两相流模型,相间作用的计算采用积分法则和差值函数进行时间和空间的近似,在此基础上提出新的气固两相流介观耦合算法。气固两相流问题的分析与计算结果表明,相较于经典的格子Boltzmann方法,DUGKS提供了更具潜力的气固两相流计算框架。Discrete Unified Gas-Kinetic Schemes(DUGKS)contains more information about the spatiotemporal evolution of the flow field than traditional Kinetic methods,but DUGKS is seldom applied to the gas-solid two-phase flow.Based on the particle-based mesoscopic model,this paper introduces a new two-way coupling algorithm for gas-particle flows.The new algorithm is applied to simulate the motion characteristics of single particle and particle group in a square cavity.In this paper,DUGKS-Lagrange method is adopted to solve the gas-particle flows,and the interaction term is calculated approximately by combining integral rule and interpolation function method.On this basis,a new mesoscopic coupling algorithm for gas-particle two-phase flow is proposed.The comparison between classical LBE-Lagrange and DUGKS-Lagrange method indicates that the DUGKS provides a more promising computational framework for gas-particle flow.

关 键 词：气固两相流 离散统一气体动理学算法 颗粒轨道模型 气固耦合 数值模拟 

分 类 号：O351[理学—流体力学]