Extension of the Launder, Reece and Rodi model on compressible homogeneous shear flow

Marzougui, Hamed; Khlifi, H.; Tong, Lili

doi:10.1140/epjb/e2005-00173-8

Cited by 13 publications

(24 citation statements)

References 25 publications

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“…Pantano & Sarkar (2002) propose that for mixing layers the ratio of compressible to incompressible pressure-strain correlation components depends on the relative Mach number: M r ≡ U/a = 2(U 1 −U 2 )/[(a 1 +a 2 )], where the subscripts 1 and 2 denote the high-and low-speed inlets respectively, U is the mean velocity, and a is the speed of sound. Other researchers have attempted to address compressibility effects by modifying incompressible models with a blending function based on turbulent Mach number (Fujiwara, Matsuo & Chuichi 2000;Marzougui, Khlifi & Lili 2005;Park & Park 2005;Huang & Fu 2008;Kim & Park 2010;Khlifi et al 2011),…”

Section: Second-moment Closure Frameworkmentioning

confidence: 99%

Toward second-moment closure modelling of compressible shear flows

Gómez

Girimaji

2013

J. Fluid Mech.

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Compressibility profoundly affects many aspects of turbulence in high-speed flows, most notably stability characteristics, anisotropy, kinetic-potential energy interchange and spectral cascade rate. We develop a unified framework for modelling pressurerelated compressibility effects by characterizing the role and action of pressure in different speed regimes. Rapid distortion theory is used to examine the physical connection between the various compressibility effects leading to model form suggestions for pressure-strain correlation, pressure-dilatation and dissipation evolution equations. The closure coefficients are established using fixed-point analysis by requiring consistency between model and DNS asymptotic behaviour in compressible homogeneous shear flow. The closure models are employed to compute high-speed mixing layers and boundary layers. The self-similar mixing-layer profile, increased Reynolds stress anisotropy and diminished mixing-layer growth rates with increasing Mach number are all well captured. High-speed boundary-layer results are also adequately replicated even without the use of advanced thermal-flux models or low-Reynolds-number corrections.

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Section: Second-moment Closure Frameworkmentioning

confidence: 99%

Toward second-moment closure modelling of compressible shear flows

Gómez

Girimaji

2013

J. Fluid Mech.

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“…The contribution of Marzougui et al [10] appears in the correction of the C i coefficients, which became in a compressible turbulence situation a function of the turbulent Mach number. The suggested method is based on proportionality relations between, the ratio of compressible and incompressible components of the pressure strain correlation and the ratio relating the compressible and incompressible growth rate of the turbulent kinetic energy.…”

Section: Marzougui Et Al Modelmentioning

confidence: 99%

“…For the pressure-strain correlation, we used the L. R. R model in its standard form [11] and in its corrected form [8,10].…”

Section: =05)mentioning

confidence: 99%

“…Actually, the modeling of the pressure-strain correlation in compressible turbulence articulates on the simple extension of models established in incompressible turbulence as mentioned in the works of Adumitroaie et al [8], Hamba [9] and Marzougui et al [10]. Adumitroaie et al have developed a compressible correction depending on the magnitude of the turbulent Mach number to the Launder, Reece and Rodi model [11].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Pressure-Strain Models in Compressible Mixing Layer

Saadouli¹,

Marzougui²,

Tong³

2009

TOMECHJ

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The experimental results of Goebel and Dutton for compressible mixing layer are used to examine the performance of the corrections proposed by Adumitroaie et al. and Marzougui et al. to the Launder, Reece and Rodi model for the pressure-strain correlation. These models are considered with the explicit dilatational terms of Sarkar for the study of two cases in which Mc = 0.69 and 0.86. The obtained results show that the predictions of Marzougui et al. model are in good agreement with the experimental results compared with the predictions of Adumitroaie et al.

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“…So far, this assumption was applicable for the majority of liquid flows present in the industry, where pressure and velocity values were moderate. Nevertheless, thanks to technical improvements, nowadays, it is possible to achieve very high pressure conditions that produce flows with increased velocity profiles [1]; in some cases the speed is so elevated that Mach numbers could reach values higher than 0.3, so the liquid flow could become compressible, depending on pressure and density changes relative to the local speed of sound [2]. Usually, this kind of flow involves significant changes in density.…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation for high pressure flows: Model extension for compressible liquids

Payri

Tormos

2011

Mathematical and Computer Modelling

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a b s t r a c tThe present study gives a general outline for the fluid-dynamical calculation of flows at high pressure conditions. The main idea is to present a mathematical description of high pressure processes in liquids at compressible conditions, quantifying the effect of density variations on the flow pattern due to those pressure variations. The improved mathematical approach is coupled to a Large Eddy Simulation (LES) solver. The main code was developed by OpenSource Ltd. for OpenFOAM, and the authors have introduced the additional expressions in order to calculate particular variables. For validating the code improvement, the LES solver is applied to a modern common-rail nozzle injector used in diesel engines. Results have been compared against other calculations that assumed constant properties and simultaneously validated with experimental data.

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Extension of the Launder, Reece and Rodi model on compressible homogeneous shear flow

Cited by 13 publications

References 25 publications

Toward second-moment closure modelling of compressible shear flows

Toward second-moment closure modelling of compressible shear flows

Evaluation of Pressure-Strain Models in Compressible Mixing Layer

Large Eddy Simulation for high pressure flows: Model extension for compressible liquids

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