Correlations for aerodynamic force coefficients of non-spherical particles in compressible flows

TL;DR

This paper develops and validates correlations for aerodynamic force coefficients of non-spherical particles in compressible flows using detailed numerical simulations, enhancing the accuracy of multiphase flow models.

Contribution

It introduces new correlations for aerodynamic coefficients of non-spherical particles in compressible flows based on particle-resolved simulations.

Findings

Oblate spheroids exhibit highest drag, lift, and torque.

Particle shape significantly influences aerodynamic forces.

Correlations improve multiphase flow modeling accuracy.

Abstract

This study presents particle-resolved direct numerical simulations using three-dimensional body-fitted hexahedral meshes to investigate the aerodynamic force and torque coefficients of non-spherical particles in compressible flows. The simulations focus on three particle shapes: a prolate spheroid, an oblate spheroid, and a rod-like particle, across a range of Mach numbers (0.3 to 2.0), angles of attack (0 degrees to 90 degrees), and particle Reynolds numbers (100 to 300). Results indicate that the particle shape significantly impacts the aerodynamic forces on a particle in a compressible flow, with oblate spheroids exhibiting the highest drag, lift, and torque values. Correlations for these aerodynamic coefficients of the particles in a compressible flow are developed and validated. These correlations advance multiphase flow modeling by improving the accuracy of point-particle simulations for non-spherical particles in compressible flows.