低雷诺数下幂律流体中密相颗粒曳力模型研究  

Study on Drag Force Model of Dense Phase Particlesin Power Law Fluid at Low Reynolds Number

作　　者：曹元博 苏晓辉 CAO Yuan-bo;SU Xiao-hui(College of New Energy,Xi'an Shiyou University,Xi’an Shaanxi 710065,China)

机构地区：[1]西安石油大学新能源学院,陕西西安710065

出　　处：《当代化工》2023年第12期2790-2794,共5页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(No.51906202);西安石油大学研究生创新与实践能力培养计划资助(项目编号:YCS22214267)。

摘　　要：非牛顿流体颗粒两相流广泛存在于自然界和工业生产中,非牛顿流体中密相颗粒的曳力模型是两相流数值模拟的关键。基于幂律流体模型,采用直接数值模拟方法研究了低雷诺数下密相颗粒曳力与幂律指数和空隙率的关系,发现曳力随着幂律指数增加而增大,随着空隙率的增加而减小。基于模拟结果,提出了低雷诺数下幂律流体中密相颗粒曳力的预测模型,曳力模型可用于幂律流体中密相颗粒运动的数值模拟。Non-Newtonian fluid particle two-phase flow widely exists in nature and industrial production.The drag model of dense-phase particles in non-Newtonian fluid is the key to numerical simulation of two-phase flow.Based on the power law fluid model,the direct numerical simulation method was used to study the relationship between the drag force of dense phase particles,the power law index and the void ratio at low Reynolds numbers.It was found that the drag force increased with the increase of power law index,and decreased with the increase of void ratio.Based on the simulation results,a prediction model for the drag force of dense-phase particles in power-law fluids at low Reynolds numbers was proposed.The drag force model can be used for numerical simulation of the motion of dense-phase particles in power-law fluids.

关 键 词：幂律流体 颗粒堆积 空隙率 曳力模型 幂律指数 

分 类 号：TQ021.1[化学工程]