摘要
基于Nek5000求解器使用双向及四向的直接数值模拟耦合拉格朗日颗粒跟踪方法(DNS-LPT),对方管颗粒两相湍流进行了探究,与单向耦合相比,双向耦合和四向耦合作用会减小流体的平均速度,真实反映流场湍流强度。对于颗粒相,双向耦合促进颗粒在壁面的聚集行为,增加核心区域较高惯性颗粒(St^(+)≥25)的流向速度,四向耦合抑制近壁面区域高惯性颗粒(St^(+)≥25)的聚集性,增加该区域颗粒的流向速度。
This study investigates two-phase turbulent flow in square tubes using the Nek5000 solver using two-way and four-way direct numerical simulation coupled Lagrangian particle tracking(DNS-LPT).Compared with one-way coupling,two-way and four-way coupling reduce the average velocity of the fluid and accurately reflect the turbulence intensity of the flow field.For the particle phase,two-way coupling promotes particle accumulation near the wall and increases the streamwise velocity of high-inertia particles(St^(+)≥25)in the core region.Four-way coupling suppresses the accumulation of high-inertia particles(St^(+)≥25)near the wall and increases their streamwise velocity in that region.
作者
尚海洋
姚军
赵彦琳
陈昇
何萌
SHANG Haiyang;YAO Jun;ZHAO Yanlin;CHEN Sheng;HE Meng(International Joint Laboratory on Clean Energy Science and Technology,Beijing Key Laboratory of Process Fluid Filtration and Separation,College of Mechanical and Transportation Engineering,China University of Petroleum-Beijing,Beijing 102249,China;Technology Innovation Center of Risk Prevention and Control of Refining and Chemical Equipment,State Administration for Market Regulation,China Special Equipment Inspection and Research Institute,Beijing 100029,China)
出处
《化工学报》
北大核心
2025年第11期5730-5738,共9页
CIESC Journal
基金
国家自然科学基金项目(12372255,52376156)。
关键词
方管
多相流
湍流
颗粒
直接数值模拟
square duct
multiphase flow
turbulent flow
particle
direct numerical simulation
