Instability of cylindrical compressible gas jets in viscous liquid streams
type: Item
instance of: scholarly article
title: Instability of cylindrical compressible gas jets in viscous liquid streams
zbMATH Open document ID: 0912.76018
DOI: 10.1007/BF01187046
author: K. Appert
published in: Acta Mechanica
publication date: 1998-09-28T00:00:00Z
review text: We examine a linear stability of cylindrical compressible gas jets in a moving incompressible viscous liquid medium subject to varicose disturbances. It is found that the gas jet is always unstable in a range of wavenumbers under any flow condition. When the gas and liquid velocity are not equal, temporal instability is enhanced by surface tension effects at small Weber numbers, and by aerodynamic interaction between the gas and liquid at high Weber numbers (where surface tension has a stabilizing influence). Increasing liquid viscosity always reduces the growth rate and the dominant wavenumber, whereas increasing gas density always increases gas jet instability. It is also found that the relative, rather than the absolute, velocity of the gas and liquid controls temporal instability.
Mathematics Subject Classification ID: 76E05
Mathematics Subject Classification ID: 76N10
zbMATH DE Number: 1203591
zbMATH Keywords: aerodynamic interaction between gas and liquid
zbMATH Keywords: linear stability
zbMATH Keywords: varicose disturbances
zbMATH Keywords: temporal instability
zbMATH Keywords: surface tension effects
zbMATH Keywords: liquid viscosity
MaRDI profile type: Publication
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full work available at URL: https://doi.org/10.1007/bf01187046
OpenAlex ID: W2092869696
description: scientific article; zbMATH DE number 1203591