On the drag coefficient of flat and non‐flat solid particles of irregular shapes: An experimental validation study

Abstract

The very wide varieties of geometries of irregular particles makes it difficult to study their motion also propose a simple and general equation to estimate their drag coefficient (C D ). The goal of this research is to (1) experimentally validate the general C D correlation previously proposed by the authors of this article as a simple tool to estimate the C D of spherical to highly irregular particles over a wide ranges of Re from 0.001 to 300,000, and ( 2) examine and expand the reference model particles proposed by the authors to represent a wide range of irregular shapes (60 non-flat and 36 flat). A comparison between the C D experimentally measured using reference model particles over a range of Re from 9 to 2481 and the C D estimated using general C D correlation, also comparing with C D correlations by others, demonstrated the accuracy and simplicity of the proposed general C D correlation.

Investigating the Influence of Varied Particle Sizes on the Load-Bearing Properties of Arrester Bed Aggregates

“…Moreover, strategies that enhance modelling efficiency while ensuring the accuracy of particle shapes must be developed. Currently, research into the morphology of particles with irregular shapes has attracted widespread attention [7][8][9][10][11], given their ubiquitous presence across natural and engineered environments, such as rock debris and granular materials. Extensive studies into the morphological construction and physical attributes of these particles have substantially enhanced our comprehension of their unique properties and behaviours.…”