Prediction of a particle-laden turbulent channel flow: Examination of two classes of stochastic dispersion models
Identifieur interne : 000027 ( PascalFrancis/Corpus ); précédent : 000026; suivant : 000028Prediction of a particle-laden turbulent channel flow: Examination of two classes of stochastic dispersion models
Auteurs : A. Taniere ; B. ArcenSource :
- International journal of multiphase flow [ 0301-9322 ] ; 2014.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Nowadays, two families of stochastic models are mainly used to predict the dispersion of inertial particles in inhomogeneous turbulent flows. This first one is named "normalized model" and the second one "Generalized Langevin Model (GLM)". Nevertheless, the main differences between the normalized and GLM models have not been thoroughly investigated. Is there a model which is more suitable to predict the particle dispersion in inhomogeneous turbulence? We propose in the present study to clarify this point by computing a particle-laden turbulent channel flow using a GLM-type model, and also a normalized-type model. Particle statistics (such as concentration, mean and rms particle velocity, fluid-particle velocity covariances) will be provided and compared to Direct Numerical Simulation (DNS) data in order to assess the performance of both dispersion models. It will be shown that the normalized dispersion model studied can predict correctly the effect of particle inertia on some dispersion statistics, but not on all. For instance, it was found that the prediction of the particle kinetic shear stress and some components of the fluid-particle covariance is not physically acceptable.
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NO : | PASCAL 14-0090625 INIST |
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ET : | Prediction of a particle-laden turbulent channel flow: Examination of two classes of stochastic dispersion models |
AU : | TANIERE (A.); ARCEN (B.) |
AF : | Université de Lorraine, LEMTA, UMR 7563/Vandoeuvre-lès-Nancy 54500/France (1 aut.); CNRS, LEMTA, UMR 7563/Vandoeuvre-lès-Nancy 54500/France (1 aut.); Université de Lorraine, LRGP, UMR 7274/Nancy 54501/France (2 aut.); CNRS, LRGP, UMR 7274/Nancy 54501/France (2 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | International journal of multiphase flow; ISSN 0301-9322; Coden IJMFBP; Royaume-Uni; Da. 2014; Vol. 60; Pp. 1-10; Bibl. 1/4 p. |
LA : | Anglais |
EA : | Nowadays, two families of stochastic models are mainly used to predict the dispersion of inertial particles in inhomogeneous turbulent flows. This first one is named "normalized model" and the second one "Generalized Langevin Model (GLM)". Nevertheless, the main differences between the normalized and GLM models have not been thoroughly investigated. Is there a model which is more suitable to predict the particle dispersion in inhomogeneous turbulence? We propose in the present study to clarify this point by computing a particle-laden turbulent channel flow using a GLM-type model, and also a normalized-type model. Particle statistics (such as concentration, mean and rms particle velocity, fluid-particle velocity covariances) will be provided and compared to Direct Numerical Simulation (DNS) data in order to assess the performance of both dispersion models. It will be shown that the normalized dispersion model studied can predict correctly the effect of particle inertia on some dispersion statistics, but not on all. For instance, it was found that the prediction of the particle kinetic shear stress and some components of the fluid-particle covariance is not physically acceptable. |
CC : | 001B40G55K |
FD : | Ecoulement diphasique; Ecoulement turbulent; Ecoulement conduite; Modèle stochastique; Suspension particule; Modélisation; Simulation numérique; Dispersion hydrodynamique; 4755K |
ED : | Two-phase flow; Turbulent flow; Pipe flow; Stochastic model; Particle suspension; Modelling; Digital simulation; Hydrodynamic dispersion |
SD : | Modelo estocástico; Suspensión partícula; Dispersión hidrodinámica |
LO : | INIST-16459.354000506141720010 |
ID : | 14-0090625 |
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Pascal:14-0090625Le document en format XML
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<front><div type="abstract" xml:lang="en">Nowadays, two families of stochastic models are mainly used to predict the dispersion of inertial particles in inhomogeneous turbulent flows. This first one is named "normalized model" and the second one "Generalized Langevin Model (GLM)". Nevertheless, the main differences between the normalized and GLM models have not been thoroughly investigated. Is there a model which is more suitable to predict the particle dispersion in inhomogeneous turbulence? We propose in the present study to clarify this point by computing a particle-laden turbulent channel flow using a GLM-type model, and also a normalized-type model. Particle statistics (such as concentration, mean and rms particle velocity, fluid-particle velocity covariances) will be provided and compared to Direct Numerical Simulation (DNS) data in order to assess the performance of both dispersion models. It will be shown that the normalized dispersion model studied can predict correctly the effect of particle inertia on some dispersion statistics, but not on all. For instance, it was found that the prediction of the particle kinetic shear stress and some components of the fluid-particle covariance is not physically acceptable.</div>
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<ET>Prediction of a particle-laden turbulent channel flow: Examination of two classes of stochastic dispersion models</ET>
<AU>TANIERE (A.); ARCEN (B.)</AU>
<AF>Université de Lorraine, LEMTA, UMR 7563/Vandoeuvre-lès-Nancy 54500/France (1 aut.); CNRS, LEMTA, UMR 7563/Vandoeuvre-lès-Nancy 54500/France (1 aut.); Université de Lorraine, LRGP, UMR 7274/Nancy 54501/France (2 aut.); CNRS, LRGP, UMR 7274/Nancy 54501/France (2 aut.)</AF>
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<EA>Nowadays, two families of stochastic models are mainly used to predict the dispersion of inertial particles in inhomogeneous turbulent flows. This first one is named "normalized model" and the second one "Generalized Langevin Model (GLM)". Nevertheless, the main differences between the normalized and GLM models have not been thoroughly investigated. Is there a model which is more suitable to predict the particle dispersion in inhomogeneous turbulence? We propose in the present study to clarify this point by computing a particle-laden turbulent channel flow using a GLM-type model, and also a normalized-type model. Particle statistics (such as concentration, mean and rms particle velocity, fluid-particle velocity covariances) will be provided and compared to Direct Numerical Simulation (DNS) data in order to assess the performance of both dispersion models. It will be shown that the normalized dispersion model studied can predict correctly the effect of particle inertia on some dispersion statistics, but not on all. For instance, it was found that the prediction of the particle kinetic shear stress and some components of the fluid-particle covariance is not physically acceptable.</EA>
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