Interfacing Statistical Turbulence Closures with Large-Eddy Simulation

Batten, Paul; Goldberg, U.; Chakravarthy, Sukumar

doi:10.2514/1.3496

Cited by 304 publications

(132 citation statements)

References 14 publications

Supporting

Mentioning

126

Contrasting

Unclassified

Order By: Relevance

“…Recall that, as noted earlier, Keating et al (2004) used Batten et al (2004)'s procedure (i.e. a synthetic turbulence generation method) to generate inflow data for a plane channel flow and found that the redevelopment was slow requiring at least 20d.…”

Section: Plane Channel Flows Using the New Inflow Conditionmentioning

confidence: 90%

“…Because it might be fairly expensive to obtain detailed spectra, these methods were not considered for the simulations of street-scale flows . Batten et al(2004) reconstructed an inflow turbulent fluctuation field by summing a set of sines and cosines with carefully designed random phases and amplitudes, preserving a given set of space/time correlations and a set of second order moments. The procedure is easy to code and the efficiency is high.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficient Generation of Inflow Conditions for Large Eddy Simulation of Street-Scale Flows

Xie

Castro

2008

Flow Turbulence Combust

308

218

View full text Add to dashboard Cite

Abstract. Using a numerical weather forecasting code to provide the dynamic large-scale inlet boundary conditions for the computation of small-scale urban canopy flows requires a continuous specification of appropriate inlet turbulence. For such computations to be practical, a very efficient method of generating such turbulence is needed.Correlation functions of typical turbulent shear flows have forms not too dissimilar to decaying exponentials. A digital-filter-based generation of turbulent inflow conditions exploiting this fact is presented as a suitable technique for LES computation of spatially developing flows. The artificially generated turbulent inflows satisfy the prescribed integral length scales and Reynolds-stress-tensor. The method is much more efficient than, for example, Klein's or Kempf et al.'s (2005) methods because at every time step only one set of two-dimensional (rather than three-dimensional) random data is filtered to generate a set of two-dimensional data with the appropriate spatial correlations. These data are correlated with the data from the previous time step by using an exponential function based on two weight factors. The method is validated by simulating plane channel flows with smooth walls and flows over arrays of staggered cubes (a generic urban-type flow). Mean velocities, the Reynolds-stress-tensor and spectra are all shown to be comparable with those obtained using classical inlet-outlet periodic boundary conditions. Confidence has been gained in using this method to couple weather scale flows and street scale computations.

show abstract

Section: Plane Channel Flows Using the New Inflow Conditionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Efficient Generation of Inflow Conditions for Large Eddy Simulation of Street-Scale Flows

Xie

Castro

2008

Flow Turbulence Combust

308

218

View full text Add to dashboard Cite

show abstract

“…The hybridization method can be based on various ways of modifying the scales involved in the equations: in the eddy-viscosity algebraic relation [15,16] or its transport equation [17], in the turbulent kinetic energy equation [18,19], or in the scale providing equation [20,21,22], or any combination of these methods [23,11]. In order to illustrate the procedure that can be followed and the conclusions that can be drawn from the application of the criterion, two particular hybrid methods are selected, the partially integrated transport model [20,5] (PITM) and the two-equation detached eddy simulation [18] (DES) model.…”

Section: Description Of the Hybrid Methodsmentioning

confidence: 99%

Toward an equivalence criterion for Hybrid RANS/LES methods

2015

View full text Add to dashboard Cite

A criterion is established to assess the equivalence between hybrid RANS/LES methods, called H-equivalence, based on the modeled energy of the unresolved scales, which leads to similar low-order statistics of the resolved motion. Different equilibrium conditions are considered, and perturbation analyses about the equilibrium states are performed. The procedure is applied to demonstrate the equivalence between two particular hybrid methods, and leads to relationships between hybrid method parameters that control the partitioning of energy between the resolved and unresolved scales of motion. This equivalence is validated by numerical results obtained for the cases of plane and periodically constricted channel flows. This concept of H-equivalence makes it possible to view different hybrid methods as models for the same system of equations: as a consequence, detached-eddy simulation (DES), which is shown to be H-equivalent to the temporal partially integrated transport model (T-PITM) in inhomogeneous, stationary situations, can be interpreted as a model for the subfilter stress involved in the temporally filtered Navier-Stokes equations.

show abstract

“…Flow in the inlet channel is assumed to be developed. Five simulation runs have been done for the §ow: RANS simulations using k ω SST Figure 8 Schematic of the 3D di¨user Figure 9 Comparison of pressure coe©cient distribution at the lower wall of the diffuser: LES using turbulence recycling (1), using synthetic turbulence generated based on k ω SST RANS (2) and EARSM WJ BSL RANS ¦elds (3); RANS simulations using k ω SST model (4) and EARSM WJ BSL model (5); and 6 ¡ experiment model and EARSM WJ BSL model, LES simulations using turbulence recycling and using synthetic turbulence generated based on k ω SST RANS and EARSM WJ BSL RANS ¦elds.…”

Section: Three-dimensional Diffuser Flowmentioning

confidence: 99%

Assessment of an approach to generating inflow synthetic turbulence for large eddy simulations of complex turbulent flows

Adamian

Travin

2013

Progress in Flight Physics

View full text Add to dashboard Cite

An approach to generating in §ow synthetic turbulence recently developed by the authors has been applied to zonal Reynolds-Averaged Navier Stokes (RANS) / Large Eddy Simulations (LES) of two complex turbulent §ows: §ow over a wall-mounted hump and hydrofoil trailing edge §ow, and to a LES of a §ow in a three-dimensional (3D) di¨user. The results show that the zonal RANS-LES approach with synthetic turbulence at the interface is in excellent agreement with experimental data for hump and trailing edge §ows. For the di¨user §ow, it is shown that results depend signi¦cantly on the RANS model used to provide averaged velocity and Reynolds stresses at the inlet.

show abstract

Interfacing Statistical Turbulence Closures with Large-Eddy Simulation

Cited by 304 publications

References 14 publications

Efficient Generation of Inflow Conditions for Large Eddy Simulation of Street-Scale Flows

Efficient Generation of Inflow Conditions for Large Eddy Simulation of Street-Scale Flows

Toward an equivalence criterion for Hybrid RANS/LES methods

Assessment of an approach to generating inflow synthetic turbulence for large eddy simulations of complex turbulent flows

Contact Info

Product

Resources

About