Campus Units

Mechanical Engineering, Aerospace Engineering

Document Type

Article

Publication Version

Accepted Manuscript

Publication Date

4-2018

Journal or Book Title

International Journal of Multiphase Flow

Volume

101

First Page

186

Last Page

201

DOI

10.1016/j.ijmultiphaseflow.2018.01.011

Abstract

This work aims to study the interaction of a shock wave with a cloud of particles to quantify flow unsteadiness and velocity fluctuations using particle-resolved direct numerical simulation (PR-DNS). Three cases are studied, with each case revealing one aspect of the intricate flow phenomena involved in this interaction. The unsteady interaction of a shock wave with a transverse array of particles reveals the origin of unsteadiness under the effect of mutual wave-wave and wave-wake interactions between the particles. In the second case, the interaction of a shock with a particle cloud is studied, with a focus on the interaction of the complex wave system with the vortical structure. A budget analysis of the vorticity equation reveals the sources of strong unsteadiness in the particle cloud. A detailed analysis of the velocity fluctuation and kinetic energy in the fluctuating motion is performed to ascertain the importance of the velocity fluctuations that arise from the strong unsteadiness. An analogous analysis is presented, in the third case, for a gradually-induced flow on the same particle cloud along with a comparison to the shock induced case to assess the impulsive effect of shock on intensity of the fluctuating field statistics.

Comments

This is a manuscript of an article published as Hosseinzadeh-Nik, Zahra, Shankar Subramaniam, and Jonathan D. Regele. "Investigation and quantification of flow unsteadiness in shock-particle cloud interaction." International Journal of Multiphase Flow 101 (2018): 186-201. DOI: 10.1016/j.ijmultiphaseflow.2018.01.011. Posted with permission.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Copyright Owner

Elsevier Ltd.

Language

en

File Format

application/pdf

Published Version

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