Terminal velocity and drag coefficient for spherical particles

Haim Kalman; Erez Matana

doi:10.1016/j.powtec.2021.10.053

Terminal velocity and drag coefficient for spherical particles

Haim Kalman, Erez Matana

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Empirical correlations and experimental works relating the drag coefficient (C_D) of spheres to the Reynolds number (Re) and Re to the Archimedes number (Ar) were reviewed with a focus on the correlations applicable to the entire Re range. In addition, experiments with various spherical particles and fluids for the entire range of Re were conducted using high-speed video and added to the literature data. One of the correlations from the literature for Re-Ar and a modified correlation for C_D–Re were found to best fit the experimental results. The analysis also established new correlations for Re–Ha (a non-dimensional number for velocity not including particle size) and C_D–Ar. The latter is easier to use than the common C_D–Re curve.

Original language	English
Pages (from-to)	181-190
Number of pages	10
Journal	Powder Technology
Volume	396
DOIs	https://doi.org/10.1016/j.powtec.2021.10.053
State	Published - 1 Jan 2022

Keywords

Archimedes number
Drag coefficient
Reynolds number
Spherical particles
Terminal velocity

ASJC Scopus subject areas

General Chemical Engineering

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10.1016/j.powtec.2021.10.053

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title = "Terminal velocity and drag coefficient for spherical particles",

abstract = "Empirical correlations and experimental works relating the drag coefficient (CD) of spheres to the Reynolds number (Re) and Re to the Archimedes number (Ar) were reviewed with a focus on the correlations applicable to the entire Re range. In addition, experiments with various spherical particles and fluids for the entire range of Re were conducted using high-speed video and added to the literature data. One of the correlations from the literature for Re-Ar and a modified correlation for CD–Re were found to best fit the experimental results. The analysis also established new correlations for Re–Ha (a non-dimensional number for velocity not including particle size) and CD–Ar. The latter is easier to use than the common CD–Re curve.",

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AU - Matana, Erez

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N2 - Empirical correlations and experimental works relating the drag coefficient (CD) of spheres to the Reynolds number (Re) and Re to the Archimedes number (Ar) were reviewed with a focus on the correlations applicable to the entire Re range. In addition, experiments with various spherical particles and fluids for the entire range of Re were conducted using high-speed video and added to the literature data. One of the correlations from the literature for Re-Ar and a modified correlation for CD–Re were found to best fit the experimental results. The analysis also established new correlations for Re–Ha (a non-dimensional number for velocity not including particle size) and CD–Ar. The latter is easier to use than the common CD–Re curve.

AB - Empirical correlations and experimental works relating the drag coefficient (CD) of spheres to the Reynolds number (Re) and Re to the Archimedes number (Ar) were reviewed with a focus on the correlations applicable to the entire Re range. In addition, experiments with various spherical particles and fluids for the entire range of Re were conducted using high-speed video and added to the literature data. One of the correlations from the literature for Re-Ar and a modified correlation for CD–Re were found to best fit the experimental results. The analysis also established new correlations for Re–Ha (a non-dimensional number for velocity not including particle size) and CD–Ar. The latter is easier to use than the common CD–Re curve.

KW - Archimedes number

KW - Drag coefficient

KW - Reynolds number

KW - Spherical particles

KW - Terminal velocity

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VL - 396

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JO - Powder Technology

JF - Powder Technology

ER -

Terminal velocity and drag coefficient for spherical particles

Abstract

Keywords

ASJC Scopus subject areas

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