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Lookup NU author(s): Dr Vladimir ZivkovicORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Mass discharge rate, as an important characteristic quantity reflecting the fluidity of particulate materials. And it is crucial to accurately measure and calculate the mass discharge rate. There are two issues with the existing Beverloo’s equation: the inability to accurately fit the experiment points within the wide range outlet, and the lack of physical significance for the coefficient k. In this work, the fitting equations and relevant variation law of mass discharge rate were explored for eccentric silos with different sidewall frictional coefficients. The intrinsic connection between coefficient k and diameter D, frictional coefficient μ was revealed for the first time. And the frictional coefficient μ was successfully introduced into Beverloo’s equation, completing the correction and improvement of the equation. By establishing a quantitative relationship between the outlet diameter, frictional coefficient, and coefficient k, the coefficient k is given a relevant physical significance, making the equation more widely applicable. In addition, by comparing different models, it was found that the modified model has high accuracy, and the mean relative error (MRE) is only 1.3%. Meanwhile, different particle size and frictional coefficient were used to validate the modified model, demonstrating its wide applicability. This work provides new insights into coefficient calibration of the Beverloo’s equation.
Author(s): Sun G, Chen Q, Li R, Mu T, Xu Y, Li Z, Zivkovic V, Yang H
Publication type: Article
Publication status: Published
Journal: Chemical Engineering Science
Year: 2027
Volume: 338
Issue: Part A
Print publication date: 01/02/2027
Online publication date: 20/07/2026
Acceptance date: 19/07/2026
Date deposited: 10/08/2026
ISSN (print): 0009-2509
ISSN (electronic): 1873-4405
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.ces.2026.124723
DOI: 10.1016/j.ces.2026.124723
ePrints DOI: 10.57711/xdwn-5g45
Data Access Statement: Data will be made available on request.
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