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Spatial Instability Of Two‐Phase Mixing Layers
Author(s) -
Otto Thomas,
Rossi Maurice,
Boeck Thomas
Publication year - 2008
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200810635
Subject(s) - instability , mixing (physics) , mechanics , flow (mathematics) , wavelength , stability (learning theory) , phase (matter) , shear (geology) , shear flow , physics , function (biology) , materials science , optics , quantum mechanics , machine learning , evolutionary biology , computer science , composite material , biology
The initial stage of liquid atomization by a fast gas stream is considered by means of spatial stability analysis of two–phase shear layers. We solve the viscous linear stability problem for parallel flow modelled by error–function profiles. The unstable modes known from temporal theory are recovered in the convectively unstable case for fluid properties close to the air/water system. The most unstable wavelength depends only weakly on the absolute velocity relative to the laboratory system. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)