Effects of permeability on the flow past porous spheres at moderate Reynolds number: A PIV experimental study

被引：0
|
作者：
Ma, Likun [1 ]
Kashanj, Sina [2 ]
Bai, Zhishan [1 ]
Guo, Qiang [3 ]
Huang, Qinghai [1 ]
Nobes, David S. [2 ]
Ye, Mao [4 ]
机构：
[1] East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China
[2] Univ Alberta, Dept Mech Engn, Edmonton, AB T6G 1H9, Canada
[3] Chinese Acad Sci, Inst Proc Engn, State Key Lab Mesosci & Engn, Beijing 100190, Peoples R China
[4] Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Res Ctr Lowercarbon Catalysis Technol, Dalian 116023, Peoples R China
来源：
FUEL | 2025年 / 381卷
基金：
加拿大自然科学与工程研究理事会; 中国国家自然科学基金; 中国博士后科学基金;
关键词：
Porous sphere; Permeability; Particle image velocimetry; Wake characteristics; Darcy number; VISCOUS-FLOW; STEADY FLOW; DRAG FORCE; GAS-FLOW; SIMULATION; PARTICLES; WAKE; HYDRODYNAMICS; CYLINDER; VELOCITY;
D O I：
10.1016/j.fuel.2024.133212
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Porous particles are commonly used in chemical industries and the existence of porous structures as well as porous-fluid interfaces can essentially affect flow characteristics of porous particles, which is crucial for controlling multiphase flow processes and improving energy efficiency. Herein, a particle image velocimetry (PIV) experimental study was conducted to investigate the effects of permeability and Reynolds number (Re) on the flow characteristics of porous particles. For any given Darcy numbers Da at the range of 0 similar to 1.28 x 10(-3), the wake lengths behind porous spheres are approximately linear to log(10)Re. When Da >= 4.90x10(-5), evidences suggest that wake lengths behind porous spheres exhibit substantial enlargement as compared to their solid counterparts owing to the heightened push effect exerted by penetration flows. Furthermore, a trough in the profile of wake lengths behind porous spheres was found for Da of 5x10(-6)similar to 2x10(-5) and Re of 400 similar to 1200, which is induced by the combined influence of permeability and surface roughness of porous spheres. An empirical correlation of wake length L=f(Re,Da) was proposed with a clear physical meaning and a good prediction accuracy MRE=8.18 %.
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页数：15
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