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Title: Rayleigh–Taylor instability with gravity reversal

Abstract

We present results from Direct Numerical Simulations (DNS) of Rayleigh–Taylor instability at Atwood numbers up to 0.9. After the layer width had developed substantially, additional branched simulations have been run under reversed and zero gravity conditions. We focus on the modifications of the mixing layer structure and turbulence in response to the acceleration change. After the gravity reversal, the flow undergoes a complex transient process in which the vertical mass flux changes sign multiple times and, consequently, the buoyancy term in the turbulent kinetic energy transport equation changes its role back and forth from production to destruction. This behavior is examined in detail using the turbulent kinetic energy and mass flux transport equations and time instances when the vertical mass at the centerline crosses zero and reaches local minima and maxima. While the transient process significantly affects the flow anisotropy at all scales, other turbulence characteristics, like the alignment between the vorticity and eigenvectors of the strain rate tensor, retain their fully developed turbulence behavior in the interior of the layer. In addition, after the gravity reversal, the edges of the layer also exhibit characteristics closer to those of the turbulent interior, even as the fluids become more mixed. Nonemore » of these changes affects the mean density profile, which still collapses among various cases. Such significant changes in some turbulence quantities and not others are difficult to capture with existing turbulence models.« less

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1756195
Alternate Identifier(s):
OSTI ID: 1756794
Report Number(s):
LA-UR-19-26671
Journal ID: ISSN 0167-2789; S0167278920308332; 132832; PII: S0167278920308332
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Published Article
Journal Name:
Physica. D, Nonlinear Phenomena
Additional Journal Information:
Journal Name: Physica. D, Nonlinear Phenomena Journal Volume: 417 Journal Issue: C; Journal ID: ISSN 0167-2789
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Direct Numerical Simulations; Turbulent Mixing; Rayleigh-Taylor instability

Citation Formats

Livescu, D., Wei, T., and Brady, P. T.. Rayleigh–Taylor instability with gravity reversal. Netherlands: N. p., 2021. Web. https://doi.org/10.1016/j.physd.2020.132832.
Livescu, D., Wei, T., & Brady, P. T.. Rayleigh–Taylor instability with gravity reversal. Netherlands. https://doi.org/10.1016/j.physd.2020.132832
Livescu, D., Wei, T., and Brady, P. T.. Mon . "Rayleigh–Taylor instability with gravity reversal". Netherlands. https://doi.org/10.1016/j.physd.2020.132832.
@article{osti_1756195,
title = {Rayleigh–Taylor instability with gravity reversal},
author = {Livescu, D. and Wei, T. and Brady, P. T.},
abstractNote = {We present results from Direct Numerical Simulations (DNS) of Rayleigh–Taylor instability at Atwood numbers up to 0.9. After the layer width had developed substantially, additional branched simulations have been run under reversed and zero gravity conditions. We focus on the modifications of the mixing layer structure and turbulence in response to the acceleration change. After the gravity reversal, the flow undergoes a complex transient process in which the vertical mass flux changes sign multiple times and, consequently, the buoyancy term in the turbulent kinetic energy transport equation changes its role back and forth from production to destruction. This behavior is examined in detail using the turbulent kinetic energy and mass flux transport equations and time instances when the vertical mass at the centerline crosses zero and reaches local minima and maxima. While the transient process significantly affects the flow anisotropy at all scales, other turbulence characteristics, like the alignment between the vorticity and eigenvectors of the strain rate tensor, retain their fully developed turbulence behavior in the interior of the layer. In addition, after the gravity reversal, the edges of the layer also exhibit characteristics closer to those of the turbulent interior, even as the fluids become more mixed. None of these changes affects the mean density profile, which still collapses among various cases. Such significant changes in some turbulence quantities and not others are difficult to capture with existing turbulence models.},
doi = {10.1016/j.physd.2020.132832},
journal = {Physica. D, Nonlinear Phenomena},
number = C,
volume = 417,
place = {Netherlands},
year = {2021},
month = {3}
}

Journal Article:
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https://doi.org/10.1016/j.physd.2020.132832

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Works referenced in this record:

Growth rate of a shocked mixing layer with known initial perturbations
journal, May 2013

  • Weber, Christopher R.; Cook, Andrew W.; Bonazza, Riccardo
  • Journal of Fluid Mechanics, Vol. 725
  • DOI: 10.1017/jfm.2013.216

Rayleigh-Taylor instability in prominences from numerical simulations including partial ionization effects
journal, May 2014


Dynamics of buoyancy-driven flows at moderately high Atwood numbers
journal, April 2016


Effects of Diffusion on Interface Instability between Gases
journal, January 1962

  • Duff, R. E.; Harlow, F. H.; Hirt, C. W.
  • Physics of Fluids, Vol. 5, Issue 4
  • DOI: 10.1063/1.1706634

Turbulence with Large Thermal and Compositional Density Variations
journal, January 2020


Self-similarity of a Rayleigh–Taylor mixing layer at low Atwood number with a multimode initial perturbation
journal, June 2017


High-Reynolds number Rayleigh–Taylor turbulence
journal, January 2009


Harmonic to subharmonic transition of the Faraday instability in miscible fluids
journal, April 2019


Experimental study of Rayleigh–Taylor instability with a complex initial perturbation
journal, March 2009

  • Olson, D. H.; Jacobs, J. W.
  • Physics of Fluids, Vol. 21, Issue 3
  • DOI: 10.1063/1.3085811

Viscous effects on the Rayleigh-Taylor instability with background temperature gradient
journal, July 2016

  • Gerashchenko, S.; Livescu, D.
  • Physics of Plasmas, Vol. 23, Issue 7
  • DOI: 10.1063/1.4959810

Detailed measurements of a statistically steady Rayleigh–Taylor mixing layer from small to high Atwood numbers
journal, August 2010

  • Banerjee, Arindam; Kraft, Wayne N.; Andrews, Malcolm J.
  • Journal of Fluid Mechanics, Vol. 659
  • DOI: 10.1017/S0022112010002351

Effects of Atwood and Reynolds numbers on the evolution of buoyancy-driven homogeneous variable-density turbulence
journal, May 2020

  • Aslangil, Denis; Livescu, Daniel; Banerjee, Arindam
  • Journal of Fluid Mechanics, Vol. 895
  • DOI: 10.1017/jfm.2020.268

Rarefaction-driven Rayleigh–Taylor instability. Part 1. Diffuse-interface linear stability measurements and theory
journal, February 2016

  • Morgan, R. V.; Likhachev, O. A.; Jacobs, J. W.
  • Journal of Fluid Mechanics, Vol. 791
  • DOI: 10.1017/jfm.2016.46

On the Richtmyer–Meshkov instability evolving from a deterministic multimode planar interface
journal, August 2014

  • Tritschler, V. K.; Olson, B. J.; Lele, S. K.
  • Journal of Fluid Mechanics, Vol. 755
  • DOI: 10.1017/jfm.2014.436

Statistical measurements of scaling and anisotropy of turbulent flows induced by Rayleigh-Taylor instability
journal, January 2013


Incompressible Rayleigh–Taylor Turbulence
journal, January 2017


Application of monotone integrated large eddy simulation to Rayleigh–Taylor mixing
journal, July 2009

  • Youngs, David L.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 367, Issue 1899
  • DOI: 10.1098/rsta.2008.0303

Inviscid criterion for decomposing scales
journal, May 2018


Numerical simulation of turbulent mixing by Rayleigh-Taylor instability
journal, July 1984


Density ratio dependence of Rayleigh–Taylor mixing for sustained and impulsive acceleration histories
journal, February 2000

  • Dimonte, Guy; Schneider, Marilyn
  • Physics of Fluids, Vol. 12, Issue 2
  • DOI: 10.1063/1.870309

Rarefaction-driven Rayleigh–Taylor instability. Part 2. Experiments and simulations in the nonlinear regime
journal, January 2018

  • Morgan, R. V.; Cabot, W. H.; Greenough, J. A.
  • Journal of Fluid Mechanics, Vol. 838
  • DOI: 10.1017/jfm.2017.893

An overview of Rayleigh-Taylor instability
journal, July 1984


Direct numerical simulation and large-eddy simulation of stationary buoyancy-driven turbulence
journal, December 2009


The density ratio dependence of self-similar Rayleigh–Taylor mixing
journal, November 2013

  • Youngs, David L.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 371, Issue 2003
  • DOI: 10.1098/rsta.2012.0173

Compact finite difference schemes with spectral-like resolution
journal, November 1992


High-resolution Navier-Stokes simulations of Richtmyer-Meshkov instability with reshock
journal, October 2019


Growth of a Richtmyer-Meshkov turbulent layer after reshock
journal, September 2011

  • Thornber, B.; Drikakis, D.; Youngs, D. L.
  • Physics of Fluids, Vol. 23, Issue 9
  • DOI: 10.1063/1.3638616

Influence of the mixing parameter on the second order moments of velocity and concentration in Rayleigh–Taylor turbulence
journal, June 2016

  • Soulard, Olivier; Griffond, Jérôme; Gréa, Benoît-Joseph
  • Physics of Fluids, Vol. 28, Issue 6
  • DOI: 10.1063/1.4954213

A simple experiment to investigate two‐dimensional mixing by Rayleigh–Taylor instability
journal, June 1990

  • Andrews, M. J.; Spalding, D. B.
  • Physics of Fluids A: Fluid Dynamics, Vol. 2, Issue 6
  • DOI: 10.1063/1.857652

Numerical simulation of mixing by Rayleigh–Taylor and Richtmyer–Meshkov instabilities
journal, December 1994


Late-time quadratic growth in single-mode Rayleigh-Taylor instability
journal, October 2012


Suppression of Rayleigh-Taylor turbulence by time-periodic acceleration
journal, March 2019


Modelling turbulent mixing by Rayleigh-Taylor instability
journal, July 1989


Variable-density mixing in buoyancy-driven turbulence
journal, May 2008


Experimental investigation of turbulent mixing by Rayleigh-Taylor instability
journal, July 1984


Modeling of Rayleigh-Taylor mixing using single-fluid models
journal, January 2019

  • Kokkinakis, Ioannis W.; Drikakis, Dimitris; Youngs, David L.
  • Physical Review E, Vol. 99, Issue 1
  • DOI: 10.1103/PhysRevE.99.013104

Rayleigh–Taylor turbulence: self-similar analysis and direct numerical simulations
journal, May 2004


Evolution of the single-mode Rayleigh-Taylor instability under the influence of time-dependent accelerations
journal, January 2016


Rayleigh-Taylor mixing in supernova experiments
journal, October 2015

  • Swisher, N. C.; Kuranz, C. C.; Arnett, D.
  • Physics of Plasmas, Vol. 22, Issue 10
  • DOI: 10.1063/1.4931927

Numerical investigation of initial condition effects on Rayleigh-Taylor instability with acceleration reversals
journal, November 2016


Numerical simulations of two-fluid turbulent mixing at large density ratios and applications to the Rayleigh–Taylor instability
journal, November 2013

  • Livescu, D.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 371, Issue 2003
  • DOI: 10.1098/rsta.2012.0185

Alignment of vorticity and scalar gradient with strain rate in simulated Navier–Stokes turbulence
journal, January 1987

  • Ashurst, Wm. T.; Kerstein, A. R.; Kerr, R. M.
  • Physics of Fluids, Vol. 30, Issue 8
  • DOI: 10.1063/1.866513

Rayleigh–Taylor instability of violently collapsing bubbles
journal, August 2002

  • Lin, Hao; Storey, Brian D.; Szeri, Andrew J.
  • Physics of Fluids, Vol. 14, Issue 8
  • DOI: 10.1063/1.1490138

Three‐dimensional numerical simulation of turbulent mixing by Rayleigh–Taylor instability
journal, May 1991

  • Youngs, David L.
  • Physics of Fluids A: Fluid Dynamics, Vol. 3, Issue 5
  • DOI: 10.1063/1.858059

The Derivation and Numerical Solution of the Equations for Zero Mach Number Combustion
journal, January 1985


Rayleigh-Taylor instability with complex acceleration history
journal, October 2007


Reynolds number effects on Rayleigh–Taylor instability with possible implications for type Ia supernovae
journal, July 2006

  • Cabot, William H.; Cook, Andrew W.
  • Nature Physics, Vol. 2, Issue 8
  • DOI: 10.1038/nphys361

The Rayleigh-Taylor Instability driven by an accel-decel-accel profile
journal, November 2013

  • Ramaprabhu, P.; Karkhanis, V.; Lawrie, A. G. W.
  • Physics of Fluids, Vol. 25, Issue 11
  • DOI: 10.1063/1.4829765

Challenging Mix Models on Transients to Self-Similarity of Unstably Stratified Homogeneous Turbulence
journal, April 2016

  • Gréa, Benoît-Joseph; Burlot, Alan; Griffond, Jérôme
  • Journal of Fluids Engineering, Vol. 138, Issue 7
  • DOI: 10.1115/1.4032533

A Two-length Scale Turbulence Model for Single-phase Multi-fluid Mixing
journal, September 2015

  • Schwarzkopf, J. D.; Livescu, D.; Baltzer, J. R.
  • Flow, Turbulence and Combustion, Vol. 96, Issue 1
  • DOI: 10.1007/s10494-015-9643-z

Transition stages of Rayleigh–Taylor instability between miscible fluids
journal, September 2001


Rayleigh–Taylor mixing: direct numerical simulation and implicit large eddy simulation
journal, June 2017