NDLI: Vorticity dynamics after the shock

Content Provider	Springer Nature Link
Author	Livescu, D. Ryu, J.
Copyright Year	2015
Abstract	The interaction of a shock wave with quasi-vortical isotropic turbulence (IT) represents a basic problem for studying some of the phenomena associated with high speed flows, such as hypersonic flight, supersonic combustion and Inertial Confinement Fusion (ICF). In general, in practical applications, the shock width is much smaller than the turbulence scales and the upstream turbulent Mach number is modest. In this case, recent high resolution shock-resolved Direct Numerical Simulations (DNS) (Ryu and Livescu, J Fluid Mech 756:R1, 2014) show that the interaction can be described by the Linear Interaction Approximation (LIA). Using LIA to alleviate the need to resolve the shock, DNS post-shock data can be generated at much higher Reynolds numbers than previously possible. Here, such results with Taylor Reynolds number approximately 180 are used to investigate the changes in the vortical structure as a function of the shock Mach number, $$M_{s}$$ , up to $$M_{s}=10$$ . It is shown that, as $$M_{s}$$ increases, the shock interaction induces a tendency towards a local axisymmetric state perpendicular to the shock front, which has a profound influence on the vortex-stretching mechanism and divergence of the Lamb vector and, ultimately, on the flow evolution away from the shock.
Starting Page	241
Ending Page	251
Page Count	11
File Format	PDF
ISSN	09381287
Journal	Shock Waves
Volume Number	26
Issue Number	3
e-ISSN	14322153
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-07-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Compressible turbulence Shock–turbulence interaction Vorticity LIA DNS Lamb vector Engineering Thermodynamics, Heat and Mass Transfer Fluid- and Aerodynamics Engineering Fluid Dynamics Thermodynamics Acoustics Condensed Matter Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanical Engineering

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