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Vorobieff P, Anderson M, Conroy J, et al. Vortex formation in a shock-accelerated gas induced by particle seeding. Phys Rev Lett. 2011;106(18):184503doi: 10.1103/PhysRevLett.106.184503.
Vorobieff, P., Anderson, M., Conroy, J., White, R., Truman, C. R., & Kumar, S. (2011). Vortex formation in a shock-accelerated gas induced by particle seeding. Physical review letters, 106(18), 184503. https://doi.org/10.1103/PhysRevLett.106.184503
Vorobieff, Peter, et al. "Vortex formation in a shock-accelerated gas induced by particle seeding." Physical review letters vol. 106,18 (2011): 184503. doi: https://doi.org/10.1103/PhysRevLett.106.184503
Vorobieff P, Anderson M, Conroy J, White R, Truman CR, Kumar S. Vortex formation in a shock-accelerated gas induced by particle seeding. Phys Rev Lett. 2011 May 06;106(18):184503. doi: 10.1103/PhysRevLett.106.184503. Epub 2011 May 04. PMID: 21635092.
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Phys Rev Lett. 2011 May 06;106(18):184503. doi: 10.1103/PhysRevLett.106.184503. Epub 2011 May 04.

Vortex formation in a shock-accelerated gas induced by particle seeding.

Physical review letters

Peter Vorobieff, Michael Anderson, Joseph Conroy, Ross White, C Randall Truman, Sanjay Kumar

Affiliations

  1. Department of Mechanical Engineering, The University of New Mexico, New Mexico 87131, USA.

PMID: 21635092 DOI: 10.1103/PhysRevLett.106.184503

Abstract

An instability forms in gas of constant density (air) with an initial nonuniform seeding of small particles or droplets as a planar shock wave passes through the two-phase medium. The seeding nonuniformity is produced by vertical injection of a slow-moving jet of air premixed with glycol droplets or smoke particles into the test section of a shock tube, with the plane of the shock parallel to the axis of the jet. After the shock passage, two counterrotating vortices form in the plane normal to that axis. The physical mechanism of the instability we observe is peculiar to multiphase flow, where the shock acceleration causes the second (embedded) phase to move with respect to the embedding medium. With sufficient seeding concentration, this leads to entrainment of the embedding phase that acquires a relative velocity dependent on the initial seeding, resulting in vortex formation in the flow.

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