Results 221 to 230 of about 265,403 (262)
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2011
At high Reynolds number the fluid velocity is exponentially sensitive to perturbations of the problem data. This sensitivity, however, is not uniform. The large structures (large eddies) evolve deterministically and are thus not sensitive [BFG02]. The small eddies are sensitive because they have a random character.
William J. Layton, Leo G. Rebholz
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At high Reynolds number the fluid velocity is exponentially sensitive to perturbations of the problem data. This sensitivity, however, is not uniform. The large structures (large eddies) evolve deterministically and are thus not sensitive [BFG02]. The small eddies are sensitive because they have a random character.
William J. Layton, Leo G. Rebholz
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2016
Let us briefly reexamine the spatial scales present in turbulent flows before discussing how large-eddy simulation can be formulated. Consider the turbulent energy spectra for various turbulent flows across a wide range of Reynolds numbers. Shown in Fig. 8.1 are the energy spectra for various three-dimensional turbulent flows non-dimensionalized by the
Takeo Kajishima, Kunihiko Taira
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Let us briefly reexamine the spatial scales present in turbulent flows before discussing how large-eddy simulation can be formulated. Consider the turbulent energy spectra for various turbulent flows across a wide range of Reynolds numbers. Shown in Fig. 8.1 are the energy spectra for various three-dimensional turbulent flows non-dimensionalized by the
Takeo Kajishima, Kunihiko Taira
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Large-eddy simulation of magnetohydrodynamic turbulence [PDF]
Computer Physics Communications, 2002 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Muller, Wolf-Christian, Carati, Daniele
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Large eddy simulation of industrial flares
Proceedings of the 2011 companion on High Performance Computing Networking, Storage and Analysis Companion, 2011At the Institute for Clean and Secure Energy at the University of Utah we are focused on education through interdisciplinary research on high-temperature fuel-utilization processes for energy generation, and the associated health, environmental, policy and performance issues.
Philip Smith +3 more
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Large Eddy Simulation of a Counterflow Configuration
ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, 2001AbstractThe aim of the present work is to extend the possibilities of predicting turbulent activity and mixing in counterflow burners. Such burners are well suited for the calibration and validation of combustion models. Because of their geometry, they allow simulations to be performed in only one dimension of space.
Kempf, A. +4 more
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1987
As already stressed in the previous chapters, there is a priori no difficulty in envisaging a numerical solution of the unstationary Navier Stokes equations for rotational flows: the various operators are represented by discrete systems relating the values taken by the velocity or vorticity components, pressure, density, temperature, etc...
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As already stressed in the previous chapters, there is a priori no difficulty in envisaging a numerical solution of the unstationary Navier Stokes equations for rotational flows: the various operators are represented by discrete systems relating the values taken by the velocity or vorticity components, pressure, density, temperature, etc...
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Large Eddy Simulation of a Backdraft with Watermist
Journal of Applied Fire Science, 2005A subgrid scale (SGS) model for partially premixed combustion has been implemented and applied to simulate the backdraft phenomena and its mitigation by watermist. The model is based on the coupling of independent approaches for non-premixed and premixed turbulent combustion.
Magda, S I +4 more
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2000
Introduction In large-eddy simulation (LES), the larger three-dimensional unsteady turbulent motions are directly represented, whereas the effects of the smallerscale motions are modelled. In computational expense, LES lies between Reynolds-stress models and DNS, and it is motivated by the limitations of each of these approaches.
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Introduction In large-eddy simulation (LES), the larger three-dimensional unsteady turbulent motions are directly represented, whereas the effects of the smallerscale motions are modelled. In computational expense, LES lies between Reynolds-stress models and DNS, and it is motivated by the limitations of each of these approaches.
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Backscatter Models for Large-Eddy Simulations
Theoretical and Computational Fluid Dynamics, 1997zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Domaradzki, J. Andrzej, Saiki, Eileen M.
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Journal of Fluids Engineering, 2012
In this work, we use large eddy simulation (LES) to study the influence of grid and subgrid model on the lift and drag force predictions of a fixed cylinder undergoing streamwise sinusoidal oscillations in a steady flow, resulting in a varying Reynolds number, Re, within the range 405 ≤ Re ≤ 2482.
A. Feymark +3 more
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In this work, we use large eddy simulation (LES) to study the influence of grid and subgrid model on the lift and drag force predictions of a fixed cylinder undergoing streamwise sinusoidal oscillations in a steady flow, resulting in a varying Reynolds number, Re, within the range 405 ≤ Re ≤ 2482.
A. Feymark +3 more
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