Numerical simulation of the heterogeneous combustion of dust clouds containing polydisperse porous iron particles

Bozorg, M. V., Guan, Y., Doranehgard, M. H., Hong, K., Xiong, Q., Karimi, N. and Li, L. K.B. (2020) Numerical simulation of the heterogeneous combustion of dust clouds containing polydisperse porous iron particles. Energy, 212, 118759. (doi: 10.1016/j.energy.2020.118759)

Abstract

In this study, heterogeneous combustion of dust clouds containing polydisperse porous iron particles was numerically investigated. The main aim was to develop a discrete three-dimensional model to quantify the effects of particle size, porosity, cloud concentration, and polydispersity on flame propagation speed. The developed numerical model was validated against experimental data to show its promising accuracy. The modeling results show that increasing the cloud concentration increases flame propagation speed significantly, regardless of the particle size distribution, by about 3 times. Increasing the particle porosity can increase flame propagation remarkably, i.e., for particle sizes in the range of 1−3, 1−10, and 1−30 um, flame propagation speed was elevated by up to 24.2%, 36.7%, and 22.6%, respectively, when particle porosity increases from 0 to 0.1. However, increasing the particle size itself was found to decrease flame propagation speed as larger particles tend to be more difficult to ignite. For example, when the particle size distribution changes from 1−3 to 1−30 um, flame propagation speed decreases by a factor of 3.6. These findings serve to improve our understanding of heterogeneous combustion of dust clouds containing polydisperse porous iron particles.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Karimi, Dr Nader

Creator Roles

Karimi, N.: Investigation

• Authors: Bozorg, M. V., Guan, Y., Doranehgard, M. H., Hong, K., Xiong, Q., Karimi, N., and Li, L. K.B.
• College/School: College of Science and Engineering > School of Engineering
• Journal Name: Energy
• Publisher: Elsevier
• ISSN: 0360-5442
• ISSN (Online): 1873-6785
• Published Online: 04 September 2020
• Copyright Holders: Copyright © 2020 Elsevier Ltd.
• First Published: First published in Energy 212:118759
• Publisher Policy: Reproduced in accordance with the publisher copyright policy