Temporal and spatial instability of a compound jet in a surrounding gas

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  • Muhammad F. Afzaal
  • Jamal Uddin
  • Abdullah M. Alsharif
  • Mohammad Mohsin

Colleges, School and Institutes


Droplet generated from the rupture of a compound liquid jet can be used to produce encapsulated droplets which have applications in a wide variety of industrial processes. In this paper, we examine the instability of a two dimensional axisymmetric inviscid compound jet falling vertically downwards in a surrounding gas under the influence of gravity. The steady state equations are derived using an asymptotic method and the linear instability, including temporal and spatial instability, is determined using a multiple scales approach. The results are analysed to investigate how the gas-to-shell density ratio affects key features of the jet including theoretical breakup lengths.


Original languageEnglish
Article number044106
Number of pages12
JournalPhysics of Fluids
Issue number4
Publication statusPublished - 15 Apr 2015

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