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.
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Copyright Owner
Elsevier Ltd.
Copyright Date
2018
Language
en
File Format
application/pdf
Recommended Citation
Hosseinzadeh-Nik, Zahra; Subramaniam, Shankar; and Regele, Jonathan D., "Investigation and quantification of flow unsteadiness in shock-particle cloud interaction" (2018). Mechanical Engineering Publications. 403.
https://lib.dr.iastate.edu/me_pubs/403
Included in
Chemical Engineering Commons, Mechanical Engineering Commons, Mechanics of Materials Commons
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.