Rayleigh-Taylor instability in drop impact experiments
نویسندگان
چکیده
This paper is associated with a video winner of 2020 American Physical Society's Division Fluid Dynamics (DFD) Gallery Motion Award for work presented at the DFD Motion. The original available online Motion, https://doi.org/10.1103/APS.DFD.2020.GFM.V0019.
منابع مشابه
Granular Rayleigh-Taylor instability: experiments and simulations.
A granular instability driven by gravity is studied experimentally and numerically. The instability arises as grains fall in a closed Hele-Shaw cell where a layer of dense granular material is positioned above a layer of air. The initially flat front defined by the grains subsequently develops into a pattern of falling granular fingers separated by rising bubbles of air. A transient coarsening ...
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Rayleigh-Taylor instability is investigated in the laboratory using a simple apparatus of novel design to set up the unstable initial conditions. Visualisation techniques give a qualitative view of the development of the instability. Quantitative measurements are obtained through digital image analysis. Of primary interest is the evolution of the velocity field. Measurements are made over a two...
متن کاملGranular Rayleigh-Taylor instability
A granular instability driven by gravity is studied experimentally and numerically. The instability arises as grains fall in a closed Hele-Shaw cell where a layer of dense granular material is positioned above a layer of air. The initially flat front defined by the grains subsequently develops into a pattern of falling granular fingers separated by rising bubbles of air. A transient coarsening ...
متن کاملA granular Rayleigh-Taylor instability: experiments and simulations
A granular instability is studied experimentally and numerically as a packing of dense granular material positioned above a gap of air falls under gravity in a closed Hele-Shaw cell; a granular analog of the RayleighTaylor instability. A characteristic pattern of fingers separated by dilute bubbles emerges along the interface, and, in contrast to the classical, hydrodynamic instability, a trans...
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ژورنال
عنوان ژورنال: Physical review fluids
سال: 2021
ISSN: ['2469-9918', '2469-990X']
DOI: https://doi.org/10.1103/physrevfluids.6.110501