Free falling of non-spherical particles in Newtonian fluids, A: Terminal velocity and drag coefficient

被引：3

作者：

Kalman, Haim ^{[1
]}

Portnikov, Dmitry ^{[1
]}

机构：

[1] Ben Gurion Univ Negev, Chair Mech Engn Fracture Mech, Lab Conveying & Handling Particulate Solids, Dept Mech Engn,Aaron Fish Chair Mech Engn Fracture, Beer Sheva, Israel

来源：

POWDER TECHNOLOGY | 2024年 / 434卷

关键词：

Non -spherical particles; Terminal velocity; Drag coefficient; Flow regime map; CORRELATION FORMULA; HISTORY FORCE; BASSET FORCE; STOKES DRAG; MOTION; ACCELERATION; SHAPE; FLOW; CYLINDERS; STEADY;

D O I：

10.1016/j.powtec.2023.119357

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The terminal velocity and drag coefficient are vital parameters for designing industrial systems involving freefalling particles. While the literature on spherical particles is abundant, that on non-spherical particles is scarce. Therefore, a comprehensive experimental study was conducted using discs, cylinders, and irregular particles of various sphericities in various fluids. First, the flow mode was analyzed, and seven flow modes were identified and described in a flow regime map. Subsequently, the terminal velocity and drag coefficient were correlated depending on the sphericity of three trends. The first is for nearly spherical particles with sphericities over 0.87, and the other two trend lines are for sphericities lower than 0.87, one for discs and the other for cylinders. Additional experiments enabled the extension of the models to nearly spherical, flat, and long particles within an error of +/- 30%.

引用

页数：18

共 53 条

[1] [Anonymous], 2013, CURR OPIN BIOTECH, DOI DOI 10.1016/j.copbio.2013.04.004
[2] Computation of the particle Basset force with a fractional-derivative approach
Bombardelli, Fabian A.
Gonzalez, Andrea E.
Nino, Yarko I.
[J]. JOURNAL OF HYDRAULIC ENGINEERING-ASCE, 2008, 134 (10): : 1513 - 1520
[3] A new model for estimation of drag force in the flow of Newtonian fluids around rigid or deformable particles
Ceylan, K
Altunbas, A
Kelbaliyev, G
[J]. POWDER TECHNOLOGY, 2001, 119 (2-3) : 250 - 256
[4] SETTLING VELOCITY OF IRREGULARLY SHAPED PARTICLES
CHIEN, SF
[J]. SPE DRILLING & COMPLETION, 1994, 9 (04) : 281 - 289
[5] A new shape dependent drag correlation formula for non-spherical rough particles. Experiments and results
Dioguardi, Fabio
Mele, Daniela
[J]. POWDER TECHNOLOGY, 2015, 277 : 222 - 230
[6] Non-spherical particles sedimentation in an incompressible Newtonian medium by Pade approximation
Dogonchi, A. S.
Hatami, M.
Hosseinzadeh, Kh.
Domairry, G.
[J]. POWDER TECHNOLOGY, 2015, 278 : 248 - 256
[7] Efficient calculation of the history force at finite Reynolds numbers
Dorgan, A. J.
Loth, E.
[J]. INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 2007, 33 (08) : 833 - 848
[8] A RATIONAL APPROACH TO DRAG PREDICTION OF SPHERICAL AND NONSPHERICAL PARTICLES
GANSER, GH
[J]. POWDER TECHNOLOGY, 1993, 77 (02) : 143 - 152
[9] Review of the empirical correlations for the drag coefficient of rigid spheres
Goossens, Walter R. A.
[J]. POWDER TECHNOLOGY, 2019, 352 : 350 - 359
[10] Grace J.R., 1978, Bubbles, Drops and Particles

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