The physics of aerobreakup. II. Viscous liquids

We extend the work of Theofanous and Li [" On the physics of aerobreakup ," Phys. Fluids 20 , 052103 ( 2008 )] on aerobreakup physics of water-like, low viscosity liquid drops, to Newtonian liquids of any viscosity. The scope includes the full range of aerodynamics from near incompressible...

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Bibliographic Details
Published in:Physics of fluids (1994) 2012-02, Vol.24 (2), p.022104-022104-39
Main Authors: Theofanous, T. G., Mitkin, V. V., Ng, C. L., Chang, C-H., Deng, X., Sushchikh, S.
Format: Article
Language:English
Subjects:
Drops and bubbles
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Hydrodynamic stability
Instrumentation for fluid dynamics
Interfacial instability
Nonhomogeneous flows
Physics
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Summary:We extend the work of Theofanous and Li [" On the physics of aerobreakup ," Phys. Fluids 20 , 052103 ( 2008 )] on aerobreakup physics of water-like, low viscosity liquid drops, to Newtonian liquids of any viscosity. The scope includes the full range of aerodynamics from near incompressible to high Mach number flows. The key physics of Rayleigh-Taylor piercing (RTP, first criticality) and of shear-induced entrainment (SIE, second and terminal criticality) are verified and quantified by new viscosity- and capillarity-based scalings for fluids of any viscosity. The relevance and predictive power of linear stability analysis of the Rayleigh-Taylor and Kelvin-Helmholtz problems (both including viscosity) is demonstrated for the RTP and the SIE regimes, respectively. The advanced stages of breakup and of the resulting particle-clouds are observed and clear definition and quantification of breakup times are offered.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.3680867