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Andrew W. Cook
Researcher at Lawrence Livermore National Laboratory
Publications - 33
Citations - 2432
Andrew W. Cook is an academic researcher from Lawrence Livermore National Laboratory. The author has contributed to research in topics: Mixing (physics) & Reynolds number. The author has an hindex of 19, co-authored 33 publications receiving 2219 citations.
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Journal ArticleDOI
Reynolds number effects on Rayleigh–Taylor instability with possible implications for type Ia supernovae
William H. Cabot,Andrew W. Cook +1 more
TL;DR: In this paper, a large-scale simulation of the Rayleigh-Taylor instability is presented, which reaches a Reynolds number of 32,000, far exceeding that of all previous Rayleigh−Taylor simulations, and the scaling constant cannot be found by fitting a curve to the width of the mixing layer, but can be obtained by recourse to the similarity equation for the expansion rate of the turbulent region.
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The mixing transition in Rayleigh-Taylor instability
TL;DR: In this article, a large-eddy simulation technique is described for computing Rayleigh-Taylor instability, based on high-wavenumber-preserving subgrid-scale models, combined with high-resolution numerical methods.
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Short Note: Hyperviscosity for shock-turbulence interactions
Andrew W. Cook,William H. Cabot +1 more
TL;DR: In this paper, an artificial viscosity is described, which functions as an effective subgrid-scale model for both high and low Mach number flows, and employs a bulk visco-sensor for treating shocks and a shear viscosis for treating turbulence.
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Transition stages of Rayleigh{Taylor instability between miscible fluids
Andrew W. Cook,Paul E. Dimotakis +1 more
TL;DR: In this paper, direct numerical simulations of three-dimensional, Rayleigh-Taylor instability between two incompressible, miscible fluids, with a 3:1 density ratio, are presented.
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A high-wavenumber viscosity for high-resolution numerical methods
Andrew W. Cook,William H. Cabot +1 more
TL;DR: In this article, a spectral-like viscosity is proposed for centered differencing schemes to help stabilize numerical solutions and reduce oscillations near discontinuities, which can be made arbitrarily small by adjusting the power of the derivative.