Large Eddy Simulation of High-Reynolds-Number Free and Wall-Bounded Flows

Fureby, Christer; Grinstein, Fernando F.

doi:10.1006/jcph.2002.7119

Cited by 251 publications

(103 citation statements)

References 65 publications

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“…One solution is to integrate the equations between grid points to directly generate a set of 2nd-order finite-difference equations. Such is the approach of Implicit Large-Eddy Simulation (ILES) [Schumann, 1975, Fureby and Grinstein, 2002, Margolin and Rider, 2002, Hickel et al, 2006. This practice introduces two-dimensional cell-face averages as well as three-dimensional cell-volume averages, which must be related to each other.…”

Section: Introductionmentioning

confidence: 99%

Artificial fluid properties for large-eddy simulation of compressible turbulent mixing

2007

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An alternative methodology is described for Large-Eddy Simulation of flows involving shocks, turbulence and mixing. In lieu of filtering the governing equations, it is postulated that the large-scale behavior of an "LES" fluid, i.e., a fluid with artificial properties, will be similar to that of a real fluid, provided the artificial properties obey certain constraints. The artificial properties consist of modifications to the shear viscosity, bulk viscosity, thermal conductivity and species diffusivity of a fluid. The modified transport coefficients are designed to damp out high wavenumber modes, close to the resolution limit, without corrupting lower modes. Requisite behavior of the artificial properties is discussed and results are shown for a variety of test problems, each designed to exercise different aspects of the models. When combined with a 10th-order compact scheme, the overall method exhibits excellent resolution characteristics for turbulent mixing, while capturing shocks and material interfaces in crisp fashion.

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Section: Introductionmentioning

confidence: 99%

Artificial fluid properties for large-eddy simulation of compressible turbulent mixing

2007

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“…As the CE/SE scheme has the advantages of global conservation, monotonicity, positivity and locality, the Monotonically Integrated Large Eddy Simulation (MILES) [7] is used in this study, in which the numerical dissipation is used to mimic the turbulent dissipation without use of SGS models. The high resolution of MILES has been verified to be satisfied to simulate jet flows [10] .…”

Section: Numerical Schemesmentioning

confidence: 94%

Large Eddy Simulation of Planar Free Jet Flow Using the Space-Time Conservation Element/Solution Element Scheme

Ren¹,

Chan²,

Leung³

et al. 2018

dtcse

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Abstract. In order to investigate the characteristics of planar free jet flows, the Monotonically Integrated Large Eddy Simulation (MILES) method with the high-resolution space-time conservation element/solution element (CE/SE) scheme was used to simulate the two-dimensional free jet flows. For free jet flows within the Reynolds number range 35300~2200, the flow structures, averaged and instant velocity, turbulence intensity, velocity profiles of different cross-sections were examined respectively. The simulation results agree well with the experiment data. A region of constant height exists right after the jet outlet, in which the average centerline velocity and turbulence intensity maintains same with the jet outlet, and the instant fluctuation amplitudes are also small. For turbulent flows, the length of the undisturbed region is equal to the length of region of constant height. While near the laminar region, the length of undisturbed region is slightly larger than the length of zone of constant height. The vortex structures start to generate after the undisturbed region, develop coherently in the region of flow establishment, and break down gradually in the region of fully established flow region. As the Reynolds number increases, the length of zone of constant height, the length of undisturbed region and the length of potential core region all decrease correspondingly.

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“…The diffusive flux term is treated with a second-order expression, which involves the cell center value, the neighboring cell center value, and including the diffusion flux at the interior face. The introduced dissipative truncation error is known to mimic Smagorinsky-type SubGrid scale (SGS) modeling, see works by [17,18]. As the grid size is refined the filter size for SGS modeling subsequently decreases.…”

Section: Numerical Methodologymentioning

confidence: 99%

Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor

Sundström

Mihăescu

Giachi³

et al. 2017

IJTPP

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Abstract:Numerical simulations based on the large eddy simulation approach were conducted with the aim to explore vaneless diffuser rotating stall instability in a centrifugal compressor. The effect of the impeller blade passage was included as an inlet boundary condition with sufficiently low flow angle relative to the tangent to provoke the instability and cause circulation in the diffuser core flow. Flow quantities, velocity and pressure, were extracted to accumulate statistics for calculating mean velocity and mean Reynolds stresses in the wall-to-wall direction. The paper focuses on the assessment of the complex response of the system to the velocity perturbations imposed, the resulting pressure gradient and flow curvature effects.

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Large Eddy Simulation of High-Reynolds-Number Free and Wall-Bounded Flows

Cited by 251 publications

References 65 publications

Artificial fluid properties for large-eddy simulation of compressible turbulent mixing

Artificial fluid properties for large-eddy simulation of compressible turbulent mixing

Large Eddy Simulation of Planar Free Jet Flow Using the Space-Time Conservation Element/Solution Element Scheme

Analysis of Vaneless Diffuser Stall Instability in a Centrifugal Compressor

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