Group theory and jelly's experiment of Rayleigh-Taylor instability and Rayleigh-Taylor interfacial mixing

Evgeny E. Meshkov, Snezhana Abarzhi

Research output: Contribution to journalArticle

Abstract

Rayleigh-Taylor (RT) instability develops at the interface between two fluids of different densities accelerated against their density gradients. Intense interfacial fluid mixing ensues with time. RT mixing controls a broad range of processes in fluids, plasmas, materials, at astrophysical and at molecular scales. In this work we focus on the physics of RT mixing, which we have identified through our theoretical and experimental studies. The theory analyzes symmetries and invariants of RT dynamics and finds that RT mixing has strong correlations, weak fluctuations, and is sensitive to deterministic conditions. The experiment unambiguously observes heterogeneity, anisotropy and sensitivity to deterministic conditions of RT mixing in a broad range of setups. The theory and the experiment agree with one another, reveal that RT mixing may exhibit order and suggest new avenue for studies interfacial mixing in nature and technology.

Original languageEnglish
Article number065502
Number of pages34
JournalFluid Dynamics Research
Volume51
Issue number6
DOIs
Publication statusPublished - Dec 2019

Cite this

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title = "Group theory and jelly's experiment of Rayleigh-Taylor instability and Rayleigh-Taylor interfacial mixing",
abstract = "Rayleigh-Taylor (RT) instability develops at the interface between two fluids of different densities accelerated against their density gradients. Intense interfacial fluid mixing ensues with time. RT mixing controls a broad range of processes in fluids, plasmas, materials, at astrophysical and at molecular scales. In this work we focus on the physics of RT mixing, which we have identified through our theoretical and experimental studies. The theory analyzes symmetries and invariants of RT dynamics and finds that RT mixing has strong correlations, weak fluctuations, and is sensitive to deterministic conditions. The experiment unambiguously observes heterogeneity, anisotropy and sensitivity to deterministic conditions of RT mixing in a broad range of setups. The theory and the experiment agree with one another, reveal that RT mixing may exhibit order and suggest new avenue for studies interfacial mixing in nature and technology.",
keywords = "interfacial dynamics, Rayleigh-Taylor instability, Rayleigh-Taylor mixing, RICHTMYER-MESHKOV, TAYLOR, TRANSITION, TURBULENCE, DYNAMICS, FLUIDS, FLOWS",
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language = "English",
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Group theory and jelly's experiment of Rayleigh-Taylor instability and Rayleigh-Taylor interfacial mixing. / Meshkov, Evgeny E.; Abarzhi, Snezhana.

In: Fluid Dynamics Research, Vol. 51, No. 6, 065502, 12.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Group theory and jelly's experiment of Rayleigh-Taylor instability and Rayleigh-Taylor interfacial mixing

AU - Meshkov, Evgeny E.

AU - Abarzhi, Snezhana

PY - 2019/12

Y1 - 2019/12

N2 - Rayleigh-Taylor (RT) instability develops at the interface between two fluids of different densities accelerated against their density gradients. Intense interfacial fluid mixing ensues with time. RT mixing controls a broad range of processes in fluids, plasmas, materials, at astrophysical and at molecular scales. In this work we focus on the physics of RT mixing, which we have identified through our theoretical and experimental studies. The theory analyzes symmetries and invariants of RT dynamics and finds that RT mixing has strong correlations, weak fluctuations, and is sensitive to deterministic conditions. The experiment unambiguously observes heterogeneity, anisotropy and sensitivity to deterministic conditions of RT mixing in a broad range of setups. The theory and the experiment agree with one another, reveal that RT mixing may exhibit order and suggest new avenue for studies interfacial mixing in nature and technology.

AB - Rayleigh-Taylor (RT) instability develops at the interface between two fluids of different densities accelerated against their density gradients. Intense interfacial fluid mixing ensues with time. RT mixing controls a broad range of processes in fluids, plasmas, materials, at astrophysical and at molecular scales. In this work we focus on the physics of RT mixing, which we have identified through our theoretical and experimental studies. The theory analyzes symmetries and invariants of RT dynamics and finds that RT mixing has strong correlations, weak fluctuations, and is sensitive to deterministic conditions. The experiment unambiguously observes heterogeneity, anisotropy and sensitivity to deterministic conditions of RT mixing in a broad range of setups. The theory and the experiment agree with one another, reveal that RT mixing may exhibit order and suggest new avenue for studies interfacial mixing in nature and technology.

KW - interfacial dynamics

KW - Rayleigh-Taylor instability

KW - Rayleigh-Taylor mixing

KW - RICHTMYER-MESHKOV

KW - TAYLOR

KW - TRANSITION

KW - TURBULENCE

KW - DYNAMICS

KW - FLUIDS

KW - FLOWS

U2 - 10.1088/1873-7005/ab3e83

DO - 10.1088/1873-7005/ab3e83

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JO - Fluid Dynamics Research

JF - Fluid Dynamics Research

SN - 0169-5983

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