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Atomization and Sprays

Published 12 issues per year

ISSN Print: 1044-5110

ISSN Online: 1936-2684

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Indexed in

HYDRODYNAMIC INSTABILITIES OF TWO VISCOELASTIC LIQUID SHEET MODELS IN AN INVISCID GAS MEDIUM

Volume 25, Issue 2, 2015, pp. 123-151
DOI: 10.1615/AtomizSpr.2014011471
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ABSTRACT

The instabilities of two viscoelastic liquid sheet models (of Walters B' and Rivlin-Ericksen types) issued in an inviscid gas medium have been separetely invistigated. The dispersion relations between the growth rate and wave number of both symmetric and antisymmetric disturbances are derived for both models, and solved numerically using a new technique. The effects of the Weber number, Ohnesorge number, gas-to-liquid density ratio, and viscoelasticity parameter on the growth rates of two-and three-dimensional disturbances in both models are studied. We conclude, at low values of the Weber number, that two-dimensional disturbances dominate the instability process for both symmetric and antisymmetric disturbances, whereas if the Weber number is high, symmetric three-dimensional disturbances become more unstable than two-dimensional ones only when the x-direction wave number is small. In the antisymmetric disturbances case for all various parameters, the two-dimensional instability disturbances are found to be more unstable than the three-dimensional ones. It is found, in both models, that the gas-to-liquid density ratio, Ohnesorge number and the viscoelasticity parameter have stabilizing effects on the considered system, while the Weber number has a destabilizing effect. It found also that the instabilities in the Walters B' liquid sheet occur faster than those in the Rivlin-Ericksen liquid sheet.

CITED BY
  1. Huber Colin, Hoitt Meaghan, Barlow Nathaniel S, Hill Nicole, Keithley Kimberlee, Weinstein Steven J, On the stability of waves in classically neutral flows, IMA Journal of Applied Mathematics, 85, 2, 2020. Crossref

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