A dynamic subgrid-scale model for compressible turbulence and scalar transport

Moin, Parviz; Squires, Kyle D.; Cabot, W.; Lee, S.

doi:10.1063/1.858164

Cited by 1,355 publications

(705 citation statements)

References 9 publications

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“…The good linear relations of the coefficients for heat and water vapour in both models suggest that a dynamic determination of only one of the coefficients could be sufficient (see Moin et al (1991) and Porte-Agel (2004) for details on dynamic SGS models for scalars). The other coefficient can then be imposed based on the fits proposed here.…”

Section: Comparison Between Heat and Water Vapour Sgs Dynamicsmentioning

confidence: 99%

Subgrid-Scale Dynamics of Water Vapour, Heat, and Momentum over a Lake

Vercauteren

Bou‐Zeid

Parlange

et al. 2008

Boundary-Layer Meteorol

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We examine the dynamics of turbulence subgrid (or sub-filter) scales over a lake surface and the implications for large-eddy simulations (LES) of the atmospheric boundary layer. The analysis is based on measurements obtained during the Lake-Atmosphere Turbulent EXchange (LATEX) field campaign (August-October, 2006) over Lake Geneva, Switzerland. Wind velocity, temperature and humidity profiles were measured at 20 Hz using a vertical array of four sonic anemometers and open-path gas analyzers. The results indicate that the observed subgrid-scale statistics are very similar to those observed over land surfaces, suggesting that the effect of the lake waves on surface-layer turbulence during LATEX is small. The measurements allowed, for the first time, the study of subgrid-scale turbulent transport of water vapour, which is found to be well correlated with the transport of heat, suggesting that the subgrid-scale modelling of the two scalars may be coupled to save computational resources during LES.

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Section: Comparison Between Heat and Water Vapour Sgs Dynamicsmentioning

confidence: 99%

Subgrid-Scale Dynamics of Water Vapour, Heat, and Momentum over a Lake

Vercauteren

Bou‐Zeid

Parlange

et al. 2008

Boundary-Layer Meteorol

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“…Because of the very high Reynolds number of the solar dynamics the numerical modeling requires an accurate description of turbulent dissipation and transport on the numerical subgrid scale. The recent radiative hydrodynamics modeling using the Large-Eddy Simulations (LES) approach and various subgrid scale (SGS) formulations [56] showed that among these formulations the most accurate description in terms of the reproducing the total amount of the stochastic energy input to the acoustic oscillations is provided by a dynamic Smagorinsky model [63,64] (Fig. 5a).…”

Section: Excitation By Turbulent Convectionmentioning

confidence: 99%

Advances in Global and Local Helioseismology: An Introductory Review

Kosovichev

2011

The Pulsations of the Sun and the Stars

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Abstract. Helioseismology studies the structure and dynamics of the Sun's interior by observing oscillations on the surface. These studies provide information about the physical processes that control the evolution and magnetic activity of the Sun. In recent years, helioseismology has made substantial progress towards the understanding of the physics of solar oscillations and the physical processes inside the Sun, thanks to observational, theoretical and modeling efforts. In addition to the global seismology of the Sun based on measurements of global oscillation modes, a new field of local helioseismology, which studies oscillation travel times and local frequency shifts, has been developed. It is capable of providing 3D images of the subsurface structures and flows. The basic principles, recent advances and perspectives of global and local helioseismology are reviewed in this article.

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“…A semi-implicit temporal integration was used [32]. Standard dynamic models were used to determine eddy viscosity and eddy di↵usivity values [12].…”

Section: Les Numerical Parameters and Implementationmentioning

confidence: 99%

“…In particular, this assumption allows the use of the so-called dynamic modeling approach [12,13], which enables the computation of model coe cients in situ. Since one of the main drawbacks of the Reynolds-averaged Navier-Stokes (RANS) simulations is the lack of universal values of model coe cients, this ability in LES to determine coe cient values on the fly is considered to be one of the principal reasons for the accuracy of the technique.…”

Section: Introductionmentioning

confidence: 99%

Large eddy simulation of a lifted ethylene flame using a dynamic nonequilibrium model for subfilter scalar variance and dissipation rate

Kaul

Raman

Knudsen

et al. 2013

Proceedings of the Combustion Institute

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Accurate prediction of nonpremixed turbulent combustion using large eddy simulation (LES) requires detailed modeling of the mixing between fuel and oxidizer at scales finer than the LES filter resolution. In conserved scalar combustion models, the small scale mixing process is quantified by two parameters, the subfilter scalar variance and the subfilter scalar dissipation rate. The most commonly used models for these quantities assume a local equilibrium exists between production and dissipation of variance. Such an assumption has limited validity in realistic, technically relevant flow configurations. However, nonequilibrium models for variance and dissipation rate typically contain a model coe cient whose optimal value is unknown a priori for a given simulation. Furthermore, conventional dynamic procedures are not useful for estimating the value of this coe cient. In this work, an alternative dynamic procedure based on the transport equation for subfilter scalar variance is presented, along with a robust conditional averaging approach for evaluation of the

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A dynamic subgrid-scale model for compressible turbulence and scalar transport

Cited by 1,355 publications

References 9 publications

Subgrid-Scale Dynamics of Water Vapour, Heat, and Momentum over a Lake

Subgrid-Scale Dynamics of Water Vapour, Heat, and Momentum over a Lake

Advances in Global and Local Helioseismology: An Introductory Review

Large eddy simulation of a lifted ethylene flame using a dynamic nonequilibrium model for subfilter scalar variance and dissipation rate

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