Assessment of a Numerical Methodology for Large Eddy Simulation of ICE Wall Bounded Non-Reactive Flows

Brusiani, Federico; Forte, Claudio; Bianchi, Gian Marco

doi:10.4271/2007-01-4145

Cited by 20 publications

(16 citation statements)

References 17 publications

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“…The Length Scale Resolution parameter (LSR) has been used for estimating the LES completeness [3]. According to Pope [25], an LES is considered to be complete if it resolves at least 80 % of the kinetic energy contained in the flow.…”

Section: Averaged Fieldsmentioning

confidence: 99%

Comparison of Direct and Large Eddy Simulations of the Turbulent Flow in a Valve/Piston Assembly

Montorfano

Piscaglia

Schmitt

et al. 2015

Flow Turbulence Combust

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Section: Averaged Fieldsmentioning

confidence: 99%

Comparison of Direct and Large Eddy Simulations of the Turbulent Flow in a Valve/Piston Assembly

Montorfano

Piscaglia

Schmitt

et al. 2015

Flow Turbulence Combust

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“…Poinsot, with a variety of other researchers, has used WALE with non-engine flows in the development of a new code for engine applications [25,26]. Bianchi et al have shown good results with WALE in engine flows with a detailed analysis of flow around the intake valves [27,28].…”

Section: T1mentioning

confidence: 99%

“…The primary insight was to start with equation (24) and use other formulations for the coefficient tensor. For example, Lu et al found that a gradient type approach results in C ij = 2 G ij G kk where; G ij = ∂ u i ∂x k ∂ u j ∂x k (27) This specific form of the dynamic structure model was shown to work well for simple flows. Testing for engine applications is currently underway.…”

Section: Appendixmentioning

confidence: 99%

Large-eddy simulations for internal combustion engines – a review

Rutland

2011

International Journal of Engine Research

236

150

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A review of using large-eddy simulation (LES) in computational fluid dynamic studies of internal combustion engines is presented. Background material on turbulence modelling, LES approaches, specifically for engines, and the expectations of LES results are discussed. The major modelling approaches for turbulence, combustion, scalars, and liquid sprays are discussed. In each of these areas, a taxonomy is presented for the various types of models appropriate for engines. Advantages, disadvantages, and examples of use in the literature are described for the various types of models. Several recent examples of engine studies using LES are discussed. Recommendations and future prospects are included.

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“…It helps to clearly match the adopted mesh size to the local energy resolution all over the computational domain. In [20,29], the authors found that a LSR value of 3-5 is the upper limit to guarantee a reasonable LES resolution at an affordable computational cost.…”

Section: Analisys and Discussion Of The Resultsmentioning

confidence: 99%

“…For both cases, LES results are compared to experimental LDA measurements. The quality of the performed LES simulations are evaluated by the Length Scale Resolution (LSR) parameter defined by the authors [20]. All the models described have been implemented in Lib-ICE Ò , a C+ + library based on the OpenFOAM Ò technology [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Boundary Conditions and SGS Models for LES of Wall-Bounded Separated Flows: An Application to Engine-Like Geometries

Piscaglia

Montorfano

Onorati

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) des e´coulements froids dans des ge´ome´tries complexes, comme dans les cylindres des moteurs a`combustion interne. L'imple´mentation de conditions aux limites a`l'entre´e pour la ge´ne´ration de turbulence synthe´tique et de deux mode`les des e´chelles infe´rieures a`la maille, le mode`le local dynamique de Smagorinsky et le mode`le SGS (Sub-Grid Scales) de viscosite´WALE (Wall-Adapting Local Eddy), est de´crite. Le mode`le WALE est baseś ur le carre´du tenseur du gradient de vitesse. Il prend en compte a`la fois les effets de la pression et du taux de rotation des plus petites fluctuations turbulentes de´tectables et il de´crit de manie`re ade´quate l'e´chelle y 3 a`proximite´des parois de la viscosite´turbulente sans ne´cessiter de pression dynamique. Il est ainsi cense´repre´senter un mode`le tre`s fiable pour les simulations ICE. La validation du mode`le a e´te´effectue´e sur deux bancs laminaires stationnaires : une ge´ome´trie a`gradin inverse´(backward-facing) et une ge´ome´trie simple de moteur a`combustion interne avec une unique vanne centrale. L'exhaustivite´de la simulation LES (i.e. la qualite´de la simulation LES) est aussi discute´e.Abstract -Boundary Conditions and SGS Models for LES of Wall-Bounded Separated Flows: An Application to Engine-Like Geometries -The implementation and the combination of advanced boundary conditions and subgrid scale models for Large Eddy Simulations are presented. The goal is to perform reliable cold flow LES simulations in complex geometries, such as in the cylinders of internal combustion engines. The implementation of an inlet boundary condition for synthetic turbulence generation and of two subgrid scale models, the local Dynamic Smagorinsky and the Wall-Adapting Local Eddy-viscosity SGS model (WALE) is described. The WALE model is based on the square of the velocity gradient tensor and it accounts for the effects of both the strain and the rotation rate of the smallest resolved turbulent fluctuations and it recovers the proper y 3 near-wall scaling for the eddy viscosity without requiring dynamic pressure; hence, it is supposed to be a very reliable model for ICE simulation. Model validation has been performed separately on two steady state flow benches: a backward facing step geometry and a simple IC engine geometry with one axed central valve. A discussion on the completeness of the LES simulation (i.e. LES simulation quality) is given.

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Assessment of a Numerical Methodology for Large Eddy Simulation of ICE Wall Bounded Non-Reactive Flows

Cited by 20 publications

References 17 publications

Comparison of Direct and Large Eddy Simulations of the Turbulent Flow in a Valve/Piston Assembly

Comparison of Direct and Large Eddy Simulations of the Turbulent Flow in a Valve/Piston Assembly

Large-eddy simulations for internal combustion engines – a review

Boundary Conditions and SGS Models for LES of Wall-Bounded Separated Flows: An Application to Engine-Like Geometries

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