Transient growth of droplet instabilities in a stream

Journal Article · Wed Jan 15 04:00:00 EST 2014 · Physics of Fluids (1994)

DOI:https://doi.org/10.1063/1.4851056· OSTI ID:22257021

Mehravaran, K. ^[1]

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1. School of Engineering, The University of British Columbia, Kelowna, British Columbia V1V 1V7 (Canada)

Droplet deformation is the first stage of all aerodynamically induced-breakups, considerably affecting the characteristics of the atomization. In the present study, using an adaptive volume of fluid method, two and three-dimensional direct numerical simulations have been performed to understand droplet deformation. A high Reynolds number and a range of relatively high Weber numbers are chosen, addressing the shear breakup of droplets in a stream. The study is focused on the initiation and growth of instabilities over the droplet. The role of Kelvin-Helmholtz and Rayleigh-Taylor instabilities in wave formation and azimuthal transverse modulation are shown and the obtained results for the most amplified wave-numbers are compared with instability theories for zero and non-zero vorticity layers. The present results for the most amplified wave-numbers and deformation topologies are in good agreement with the previous experimental results.

• OSTI ID: 22257021
• Journal Information: Physics of Fluids (1994), Journal Name: Physics of Fluids (1994) Journal Issue: 1 Vol. 26; ISSN 1070-6631; ISSN PHFLE6
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
DEFORMATION
DROPLETS
FLUIDS
MODULATION
RAYLEIGH-TAYLOR INSTABILITY
REYNOLDS NUMBER
SHEAR
STREAMS
TOPOLOGY
TRANSIENTS