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rayleigh鈥揟aylor mixing direct numerical simulation and

rayleigh鈥揟aylor mixing direct numerical simulation and

Rayleigh–Taylor mixing: direct numerical simulation and ...

Previous research into three-dimensional numerical simulation of self-similar mixing due to Rayleigh–Taylor instability is summarized. A range of numerical approaches has been used: direct numerical simulation, implicit large eddy simulation and large eddy simulation with an

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Rayleigh–Taylor mixing: direct numerical simulation and ...

Jun 22, 2017  Much of the understanding of the mixing process has been obtained from 3D numerical simulations. Direct numerical simulation (DNS) is feasible at moderate Reynolds number and is essential for assessing the influence of Reynolds number (Re) and Schmidt number (Sc). However, many of the experiments and applications are in the high-Re regime.

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Rayleigh-Taylor mixing: direct numerical simulation and ...

Rayleigh-Taylor mixing, (iii) three-layer mixing and (iv) a tilted-rig Rayleigh-Taylor experiment. It is found that both approaches give similar results for the high-Reynolds number behavior. Direct numerical simulation is needed to assess the influence of finite Reynolds number. 1. Introduction

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Rayleigh-Taylor mixing: direct numerical simulation and ...

Jul 01, 2017  Previous research into three-dimensional numerical simulation of self-similar mixing due to Rayleigh-Taylor instability is summarized. A range of numerical approaches has been used: direct numerical simulation, implicit large eddy simulation and large eddy simulation with an explicit model for sub-grid-scale dissipation. However, few papers have made direct comparisons between the

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Numerical simulation of mixing by Rayleigh–Taylor and ...

TURMOIL3D computer program that is used for three-dimensional direct simulation of RT and RM mixing in simple situations. Two examples are studied in detail in Sections 3 and 4. It is impractical to use direct three-dimensional numerical simulation to calculate turbulent mixing in real problems where many complex physical processes need to be ...

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Investigation of Rayleigh–Taylor turbulence and mixing ...

Jan 26, 2009  A 1152 × 760 × 1280 direct numerical simulation (DNS) using initial conditions, geometry, and physical parameters chosen to approximate those of a transitional, small Atwood number, nonreacting Rayleigh–Taylor mixing experiment was presented in Paper I [Mueschke and Schilling, Phys. Fluids 21, 014106 (2009)].In addition, the DNS model of the experiment was validated by

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Investigation of Rayleigh-Taylor turbulence and mixing ...

A 1152×760×1280 direct numerical simulation (DNS) using initial conditions, geometry, and physical parameters chosen to approximate those of a transitional, small Atwood number, nonreacting Rayleigh-Taylor mixing experiment was presented in Paper I [Mueschke and Schilling, Phys. Fluids 21, 014106 (2009)]. In addition, the DNS model of the experiment was validated by comparing quantities from ...

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Rayleigh–Taylor and Richtmyer–Meshkov instability induced ...

Dec 15, 2017  Rayleigh–Taylor (RT) and Richtmyer–Meshkov(RM) instabilities are well-known pathways towards turbulent mixing layers, in many cases characterized by s

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Rayleigh–Taylor and Richtmyer–Meshkov instability induced ...

Dec 05, 2017  Rayleigh–Taylor (RT) and Richtmyer–Meshkov (RM) instabilities play an important role in a wide range of engineering, geophysical, and astrophysical fl

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(PDF) Reynolds number effects on Rayleigh–Taylor ...

Jul 23, 2006  Here, we show results from a large direct numerical simulation addressing such questions. The simulated flow reaches a Reynolds number of 32,000, far

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Rayleigh-Taylor mixing: Direct numerical simulation and ...

Data from a 1152×760×1280 direct numerical simulation (DNS) [ N. J. Mueschke and O. Schilling, “Investigation of Rayleigh–Taylor turbulence and mixing using direct numerical simulation with ...

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Rayleigh-Taylor mixing : Direct numerical simulation and ...

Previous research into three-dimensional numerical simulation of self-similar mixing due to Rayleigh-Taylor instability is summarized. A range of numerical approaches has been used: direct numerical simulation, implicit large eddy simulation and large eddy simulation with an explicit model for sub-grid-scale dissipation. However, few papers have made direct comparisons between the various ...

get price

[PDF] Rayleigh–Taylor mixing: direct numerical simulation ...

Previous research into three-dimensional numerical simulation of self-similar mixing due to Rayleigh-Taylor instability is summarized. A range of numerical approaches has been used: direct numerical simulation, implicit large eddy simulation and large eddy simulation with an explicit model for sub-grid-scale dissipation. However, few papers have made direct comparisons between the various ...

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Investigation of Rayleigh-Taylor turbulence and mixing ...

Jul 23, 2008  Investigation of Rayleigh-Taylor turbulence and mixing using direct numerical simulation with experimentally-measured initial conditions. I. Comparison to experimental data

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Investigation of Rayleigh-Taylor turbulence and mixing ...

Jul 23, 2008  Investigation of Rayleigh-Taylor turbulence and mixing using direct numerical simulation with experimentally-measured initial conditions. I. Comparison to experimental data

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Numerical simulation of mixing by Rayleigh–Taylor and ...

TURMOIL3D computer program that is used for three-dimensional direct simulation of RT and RM mixing in simple situations. Two examples are studied in detail in Sections 3 and 4. It is impractical to use direct three-dimensional numerical simulation to calculate turbulent mixing in real problems where many complex physical processes need to be ...

get price

Investigation of Rayleigh–Taylor turbulence and mixing ...

Data from a 1152×760×1280 direct numerical simulation [N. J. Mueschke and O. Schilling, Phys. Fluids 21, 014106 (2009)] of a Rayleigh-Taylor mixing layer modeled after a small-Atwood-number ...

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(PDF) Direct Numerical Simulations of Rayleigh-Taylor ...

The development of the Rayleigh-Taylor mixing layer is studied using data from an extensive new set of Direct Numerical Simulations (DNS), performed on the 0.5 Petaflops, 150k compute cores BG/L ...

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Investigation of Rayleigh-Taylor turbulence and mixing ...

A 1152×760×1280 direct numerical simulation (DNS) using initial conditions, geometry, and physical parameters chosen to approximate those of a transitional, small Atwood number, nonreacting Rayleigh-Taylor mixing experiment was presented in Paper I [Mueschke and Schilling, Phys. Fluids 21, 014106 (2009)]. In addition, the DNS model of the experiment was validated by comparing quantities from ...

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(PDF) Direct Numerical Simulation of Single-mode Rayleigh ...

Direct Numerical Simulation of Single-mode Rayleigh-Taylor Instability. 2011. Tie Wei. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Direct Numerical Simulation of Single-mode Rayleigh-Taylor Instability.

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Rayleigh-Taylor mixing : Direct numerical simulation and ...

Previous research into three-dimensional numerical simulation of self-similar mixing due to Rayleigh-Taylor instability is summarized. A range of numerical approaches has been used: direct numerical simulation, implicit large eddy simulation and large eddy simulation with an explicit model for sub-grid-scale dissipation. However, few papers have made direct comparisons between the various ...

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Direct Numerical Simulations of Rayleigh-Taylor instability

Direct Numerical Simulations of Rayleigh-Taylor instability, covering the range of Atwood number from 0:04 to 0:9. In particular, one of the simulations, at A = 0:75 and grid size 40962 4032, is the largest fully resolved instability simulation performed to date. Some

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MODELLING TURBUI~NT MIXING BY RAYLEIGH-TAYLOR

Direct two-dimensional numerical simulation and experiments, in which small rocket motors accelerate a tank containing two fluids, have been used to investigate turbulent mixing by Rayleigh-Taylor instability at a wide range of density ratios.

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Numerical simulation of turbulent mixing by Rayleigh ...

Jul 01, 1984  Physica 12D (1984) 32-44 North-Holland, Amsterdam NUMERICAL SIMULATION OF TURBULENT MIXING BY RAYLEIGH-TAYLOR INSTABILITY David L. YOUNGS Atomic Weapons Research Establishment, Aldermaston, Berkshire, England Two-dimensional hydrodynamic codes are used to simulate the growth of perturbations at an interface between two fluids of different density due

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Progress on Understanding Rayleigh–Taylor Flow and Mixing ...

First, a brief summary of measured experimental and calculated simulation quantities, of experimental approaches, and of issues and challenges in the simulation and modeling of RT experiments is presented. Implicit large-eddy, direct numerical, and large-eddy simulations validated using RT experimental data are then discussed.

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Cloud‐edge mixing: Direct numerical simulation and ...

Abstract A direct numerical simulation (DNS) with the decaying turbulence setup has been carried out to study cloud‐edge mixing and its impact on the droplet size distribution (DSD) applying thermo...

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A study of the flow-field evolution and mixing in a planar ...

A study of the flow-field evolution and mixing in a planar turbulent jet using direct numerical simulation - Volume 450 Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites.

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Direct numerical simulation and Lagrangian modeling of ...

Direct numerical simulation DNS results are presented for the joint statistics of two inhomogeneous scalar fields, one due to a mixing layer source and the other due to a contiguous top-hat source. These two sources form the basis for all scalar mixing across three streams. The

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(PDF) Direct Numerical Simulation of Turbulent Mixing in ...

We review the direct numerical simulation (DNS) of turbulent hows. We stress that DNS is a research tool, and not a brute-force solution to the Navier-Stokes equations for engineering problems.

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Numerical Simulation of Mixing Characteristics in the ...

speed, radius, pitch and eccentricity in the numerical simula-tion model, the e‘ects of process conditions and structural parameters on the mixing characteristics of the ERE were studied. We suggest that the results of the study can be used for optimizing the structure design and guiding production. 2. Numerical Simulation

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