宾汉流体与颗粒间的密相两相湍流研究  

Study on Dense Two-Phase Turbulent Flow of Bingham Fluid and Particles

作　　者：亢力强[1] 曾卓雄[2] 姜培正[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049 [2]南昌航空工业学院机械系

出　　处：《西安交通大学学报》2002年第7期693-696,共4页Journal of Xi'an Jiaotong University

摘　　要：参照密相液固两相湍流方程 ,并考虑到宾汉流体的本构关系 ,建立了描述宾汉流体与颗粒间的两相湍流流动的控制方程 ,编制了计算程序 ,为数值计算奠定了理论基础 .采用IPSAR(InterPhaseSlipAlgorithmRevised)算法 ,对直圆管内的宾汉流体与颗粒间的两相湍流流动进行了数值计算研究 .结果表明 :在直圆管中 ,颗粒相的速度分布比较均匀 ,且其在壁面处高于宾汉流体 ,随着屈服应力的增加 ,两相主流速度均减小 ,同时宾汉流体湍动能有减小的趋势 ,而颗粒相体积浓度则呈现出增加的趋势 ,因此宾汉流体的屈服应力对其湍流流动有重要的影响 .A two-phase turbulent model of Bingham fluid and particles is presented according to dense liquid-solid two-phase turbulent equations and power law fluid constitutive equation. A computer program is developed, which provides the theoretical basis for numerical computation. With inter phase slip algorithm revised (IPSAR), numerical computation is performed for the two-phase turbulent flow of Bingham fluid and particles in pipe. The results show that the velocity distribution of particle phase is flat and higher near wall than the velocity of power law fluid, that the mainstream velocity of both phases increases with increase of flow index, that the turbulent kinetic energy of power law fluid has a tendency to increase, and that the particle volume fraction appears a tendency to reduce. So yield stress has an important influence on turbulent flow.

关 键 词：宾汉流体 颗粒 密相两相湍流 屈服应力 速度分布 湍流强度 非牛顿流体 

分 类 号：O359[理学—流体力学]