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Large Eddy Simulations of the Richtmyer–Meshkov Instability in a Converging Geometry

Lombardini, Manuel and Deiterding, Ralf and Pullin, D. I. (2008) Large Eddy Simulations of the Richtmyer–Meshkov Instability in a Converging Geometry. In: Quality and Reliability of Large-Eddy Simulations. ERCOFTAC Series. No.12. Springer Netherlands , Dordrecht, pp. 283-294. ISBN 9781402085772.

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This work presents on-going research on large-eddy simulations of shock-generated mixing in Richtmyer-Meshkov flow in converging geometries. A hybrid numerical method is used on each subgrid of the mesh hierarchy within the AMROC (adaptive mesh refinement object oriented C++) framework: it is a shock capturing method but reverts to a centered scheme with low numerical viscosity in regions of smoother flow. The stretched-vortex subgrid-scale model allows for the capturing of the small-scale mixing process between the two fluids. Results presented focus on the evolution of the mixing layer and its internal statistics including various spectra and p.d.f.s of mixed molar and mass fractions. A detailed quantitative analysis has also been conducted including space-time histories of instantaneous cylindrical shell-averages of diverse quantities, taken concentrically to the main shocks. Comparisons are made with the planar Richtmyer-Meshkov instability with reshock studied by Vetter and Sturtevant (1995) [1] and Hill et al. (2006).

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Additional Information:© Springer-Verlag Berlin Heidelberg 2008. The authors would like to acknowledge the helpful conversations with D.J. Hill. This work is supported by the ASC program of the Department of Energy under subcontract no. B341492 of DoE contract W-7405-ENG-48.
Funding AgencyGrant Number
Department of Energy (DOE)W-7405-ENG-48
Subject Keywords:Large-eddy simulations (LES) with strong shocks; Richtmyer-Meshkov instability (RMI); Compressible turbulent mixing; Adaptive mesh refinement (AMR)
Series Name:ERCOFTAC Series
Issue or Number:12
Record Number:CaltechAUTHORS:20190909-133031443
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98525
Deposited By: George Porter
Deposited On:09 Sep 2019 22:50
Last Modified:16 Nov 2021 17:39

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