Vorticity dynamics after the shock–turbulence interaction
In this article, the interaction of a shock wave with quasivortical 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 shockresolved 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 postshock 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 vortexstretching mechanism and divergence of the Lamb vector and, ultimately, on the flow evolutionmore »
 Authors:

^{[1]};
^{[2]}
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Univ. of California, Berkeley, CA (United States)
 Publication Date:
 Report Number(s):
 LAUR1520842
Journal ID: ISSN 09381287
 Grant/Contract Number:
 AC5206NA25396
 Type:
 Accepted Manuscript
 Journal Name:
 Shock Waves
 Additional Journal Information:
 Conference: 21. International symposium on shock interaction, Riga (Latvia), 38 Aug 2014; Journal ID: ISSN 09381287
 Publisher:
 Springer
 Research Org:
 Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
 Sponsoring Org:
 USDOE
 Country of Publication:
 United States
 Language:
 English
 Subject:
 97 MATHEMATICS AND COMPUTING; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
 OSTI Identifier:
 1221371
Livescu, Daniel, and Ryu, Jaiyoung. Vorticity dynamics after the shock–turbulence interaction. United States: N. p.,
Web. doi:10.1007/s0019301505805.
Livescu, Daniel, & Ryu, Jaiyoung. Vorticity dynamics after the shock–turbulence interaction. United States. doi:10.1007/s0019301505805.
Livescu, Daniel, and Ryu, Jaiyoung. 2015.
"Vorticity dynamics after the shock–turbulence interaction". United States.
doi:10.1007/s0019301505805. https://www.osti.gov/servlets/purl/1221371.
@article{osti_1221371,
title = {Vorticity dynamics after the shock–turbulence interaction},
author = {Livescu, Daniel and Ryu, Jaiyoung},
abstractNote = {In this article, the interaction of a shock wave with quasivortical 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 shockresolved 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 postshock 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, Ms, up to Ms = 10. It is shown that, as Ms increases, the shock interaction induces a tendency towards a local axisymmetric state perpendicular to the shock front, which has a profound influence on the vortexstretching mechanism and divergence of the Lamb vector and, ultimately, on the flow evolution away from the shock.},
doi = {10.1007/s0019301505805},
journal = {Shock Waves},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {7}
}