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Numerical simulation of the aerobreakup of a water droplet

Published online by Cambridge University Press:  29 November 2017

Jomela C. Meng Open the ORCID record for Jomela C. Meng [Opens in a new window]  and
Tim Colonius
Jomela C. Meng*
Affiliation:
California Institute of Technology, Pasadena, CA 91125, USA
Tim Colonius
Affiliation:
California Institute of Technology, Pasadena, CA 91125, USA
*
†Email address for correspondence: jomela.meng@caltech.edu
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Abstract

We present a three-dimensional numerical simulation of the aerobreakup of a spherical water droplet in the flow behind a normal shock wave. The droplet and surrounding gas flow are simulated using the compressible multicomponent Euler equations in a finite-volume scheme with shock and interface capturing. The aerobreakup process is compared with available experimental visualizations. Features of the droplet deformation and breakup in the stripping breakup regime, as well as descriptions of the surrounding gas flow, are discussed. Analyses of observed surface instabilities and a Fourier decomposition of the flow field reveal asymmetrical azimuthal modulations and broadband instability growth that result in chaotic flow within the wake region.

JFM classification

Drops and Bubbles: Breakup/coalescence Drops and Bubbles: Drops Compressible Flows: Shock waves
Type
JFM Papers
Information
Journal of Fluid Mechanics , Volume 835 , 25 January 2018 , pp. 1108 - 1135
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Copyright
© 2017 Cambridge University Press 

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