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Numerical Simulation of Formation and Breakup of a Compound Jet by the Front–Tracking/Finite Difference Method

[+] Author Affiliations
Truong V. Vu, John C. Wells, Hideyuki Takakura

Ritsumeikan University, Kusatsu, Shiga, Japan

Shunji Homma

Saitama University, Saitama, Japan

Gretar Tryggvason

University of Notre Dame, Notre Dame, IN

Paper No. AJK2011-04011, pp. 1619-1628; 10 pages
doi:10.1115/AJK2011-04011
From:
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
  • ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D
  • Hamamatsu, Japan, July 24–29, 2011
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-4440-3
  • Copyright © 2011 by JSME

abstract

The formation and breakup of an axisymmetric immiscible, viscous, laminar compound jet flowing vertically downward into and breaking up in another immiscible liquid is studied numerically. We use a front-tracking/finite difference method to track the unsteady motion and the breakup of the compound jet interfaces, which are governed by the incompressible Navier-Stokes equations for Newtonian fluids. We consider the formation and breakup of a three-fluid compound jet in which the inner fluid density is greater than the shell’s fluid density, and compare with the case when the inner fluid density is less than the shell’s fluid density. The effects of interfacial tensions in terms of Weber number are investigated. An increase in Weber number leads to an increase in the breakup length of the compound jet and a decrease in the size of compound drops.

Copyright © 2011 by JSME

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