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Effect of Weber Number on Disintegration of Liquid Sheet With Co-Flowing Gas

[+] Author Affiliations
Mohammad Ali, M. Quamrul Islam

Bangladesh University of Engineering & Technology, Dhaka, Bangladesh

Mohammed S. Mayeed

Southern Polytechnic State University, Marietta, GA

A. K. M. Sadrul Islam

Islamic University of Technology, Dhaka, Bangladesh

Paper No. IMECE2014-36241, pp. V009T12A037; 8 pages
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 9: Mechanics of Solids, Structures and Fluids
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4958-3
  • Copyright © 2014 by ASME


The disturbances on the surface of a moving liquid sheet in a moving gaseous medium are studied to analyze the dynamics and breakup of the liquid sheet with co-flowing gas. The problem, composed of the Navier-Stokes systems associated with surface tension forces, is solved by the Volume of Fluid (VOF) technique with a Continuum Surface Force (CSF) manner artificially smoothing the discontinuity present at the interface. The investigation provides the insights into the dynamics and breakup processes. The inlet velocities of liquid and gas are determined by liquid and gas Weber number, respectively. It is found that the disturbances occurred by the gas Weber number controls the instability process for the liquid sheet breakup. The results show that there is a range of gas Weber number for the occurrence of droplet. In this range, the gas Weber number causes an aerodynamic normal force at the tip of the liquid sheet which is able to form a droplet from the tip of the liquid sheet. Below that range of gas Weber number, the aerodynamic normal force at the tip of the sheet is too low to produce a droplet and above the range, the aerodynamic normal force stretches the liquid sheet too much and no droplet occurs.

Copyright © 2014 by ASME



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