High order conservative finite difference scheme for variable density low Mach number turbulent flows

Desjardins, Olivier; Blanquart, Guillaume; Balarac, Guillaume; Pitsch, Heinz

doi:10.1016/j.jcp.2008.03.027

Cited by 574 publications

(346 citation statements)

References 47 publications

(114 reference statements)

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“…The dissipation rate χ and the tangential strain rate a t are computed using the same discrete operators as used to perform the simulations with the NGA solver [2]. The curvature κ is obtained using a least-square method given the field of c [3].…”

Section: Effect Of Discretization On the Conditional Meanmentioning

confidence: 99%

Effects of dissipation rate and diffusion rate of the progress variable on local fuel burning rate in premixed turbulent flames

Savard

Blanquart

2017

Combustion and Flame

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Section: Effect Of Discretization On the Conditional Meanmentioning

confidence: 99%

Effects of dissipation rate and diffusion rate of the progress variable on local fuel burning rate in premixed turbulent flames

Savard

Blanquart

2017

Combustion and Flame

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“…The LES mesh consists of 171 172 32 points in the three coordinate directions. A structured LES solver with second-order discretization schemes for the nonlinear and viscous terms were used [32]. The nonlinear terms in the scalar equations were treated using the BQUICK scheme [33].…”

Section: Les Numerical Parameters and Implementationmentioning

confidence: 99%

“…The nonlinear terms in the scalar equations were treated using the BQUICK scheme [33]. 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%

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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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“…The numerical schemes used for discretizing the equations are based on the work in [10], where a staggered representation of the flow quantities is used. Kinetic energy is conserved discretely, allowing accurate simulation of turbulent reacting flows.…”

Section: Numerical Frameworkmentioning

confidence: 99%

LES of Gas Exchange in IC Engines

Mittal

Kang

Doran

et al. 2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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and available online here Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°1, et téléchargeable ici D o s s i e rDOSSIER Edited by/Sous la direction de : C. Angelberger IFP Energies nouvelles International Conference / Les Rencontres Scientifiques d'IFP Energies nouvelles LES4ICE 2012 -Large Eddy Simulation for Internal Combustion Engine FlowsLES4ICE 2012 -La simulation aux grandes échelles pour les écoulements dans les moteurs à combustion interne Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 69 (2014) Abstract -LES of Gas Exchange in IC Engines -As engine technologies become increasingly complex and engines are driven to new operating points, understanding transient phenomena is important to ensure reliable engine operation. Unlike Reynolds Averaged Navier-Stokes (RANS) studies that only provide cycle-averaged information, Large Eddy Simulation (LES) studies are capable of simulating cycle-to-cycle dynamics. In this work, a finite difference based structured methodology for LES of IC engines is presented. This structured approach allows for an efficient mesh generation process and provides potential for higher order numerical accuracy. An efficient parallel scalable block decomposition is done to overcome the challenges associated with the low ratio of fluid elements to overall mesh elements. The motion of the valves and piston is handled using a dynamic cell blanking approach and the Arbitrary Lagrangian Eulerian (ALE) method, respectively. Modified three-dimensional Navier-Stokes Characteristic Boundary Conditions (NSCBC) Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 69 (2014), No. 1, pp. 29-40 Copyright Ó 2013, IFP Energies nouvelles DOI: 10.2516 are used in the simulation to prescribe conditions in the manifolds. The accuracy of the simulation framework is validated using various canonical configurations. Flow bench simulations of an axisymmetric configuration and an actual engine geometry are done with the LES methodology. Simulations of the gas exchange in an engine under motored conditions are also performed. Overall, good agreement is obtained with experiments for all the cases. Therefore, this framework can be used for LES of engine simulations. In the future, reactive LES simulations will be performed using this framework.

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High order conservative finite difference scheme for variable density low Mach number turbulent flows

Cited by 574 publications

References 47 publications

Effects of dissipation rate and diffusion rate of the progress variable on local fuel burning rate in premixed turbulent flames

Effects of dissipation rate and diffusion rate of the progress variable on local fuel burning rate in premixed turbulent flames

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

LES of Gas Exchange in IC Engines

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