NDLI: Generalised Langevin Model in Correspondence with a Chosen Standard Scalar-Flux Second-Moment Closure

Content Provider	Springer Nature Link
Author	Naud, Bertrand Merci, Bart Roekaerts, Dirk
Copyright Year	2010
Abstract	In the context of transported joint velocity-scalar probability density function methods, the correspondence between Generalised Langevin Models (GLM) for Lagrangian particle velocity evolution and Eulerian Reynolds-stress turbulence models has been established in the 1990’s by S.B. Pope. It was shown that the GLM representation of a given Reynolds stress model is not unique. It was also shown that a given GLM together with a given mixing model for particle composition evolution implies a differential scalar-flux model. In this paper, we study how extra constraints can be applied on the choice of the GLM coefficients in order to imply a chosen scalar-flux model. This correspondence between GLM-implied and standard scalar-flux models is based on the linear relaxation term and on the mean velocity gradient contributions in the rapid term. In general, GLM-implied models possibly involve more terms (including anisotropy effects in the scalar-flux decay rate and some high-order terms in the rapid-pressure-scrambling term). The proposed form of the GLM supposes a non-constant value for the diffusion coefficient C 0, originally identified as a Kolmogorov constant. Here, the value of C 0 is determined in order to yield the Monin model for linear relaxation of the scalar-flux, and the constant in the rapid-pressure contribution is related to the choice of the parameter β ∗ in the GLM. We finally show how GLM-implied scalar-flux models are in general dependent on the choice of the mixing model and how the proposed GLM can reduce this dependency. These developments are illustrated by results obtained from calculations of the Sydney bluff-body stabilised flame HM1.
Starting Page	363
Ending Page	382
Page Count	20
File Format	PDF
ISSN	13866184
Journal	Flow, Turbulence and Combustion
Volume Number	85
Issue Number	3-4
e-ISSN	15731987
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-07-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Generalised Langevin Model (GLM) Differential scalar-flux model Diffusion coefficient C 0 Mixing model dependence on velocity Automotive Engineering Fluid- and Aerodynamics Engineering Thermodynamics, Heat and Mass Transfer Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry Chemical Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Investigation of Mixing Models and Conditional Moment Closure Applied to Autoignition of Hydrogen Jets

Stochastic Simulation of Scalar Mixing Capturing Unsteadiness and Small-scale Structure Based on Mean-flow Properties

Conditionally Statistical Description of Turbulent Scalar Mixing at Subgrid-Scales

Turbulent Scalar Mixing in a Skewed Jet in Crossflow: Experiments and Modeling

Reynolds-Stress Model Prediction of 3-D Duct Flows

Stochastic Shell Model for Turbulent Mixing of Multiple Scalars with Mean Gradients and Differential Diffusion

Evaluations of SGS Combustion, Scalar Flux and Stress Models in a Turbulent Jet Premixed Flame

Eulerian Quadrature-Based Moment Models for Dilute Polydisperse Evaporating Sprays

Analysis of Algebraic Closures of the Mean Scalar Dissipation Rate of the Progress Variable Applied to Stagnating Turbulent Flames

Generalised Langevin Model in Correspondence with a Chosen Standard Scalar-Flux Second-Moment Closure

Similar Documents

Investigation of Mixing Models and Conditional Moment Closure Applied to Autoignition of Hydrogen Jets

Stochastic Simulation of Scalar Mixing Capturing Unsteadiness and Small-scale Structure Based on Mean-flow Properties

Conditionally Statistical Description of Turbulent Scalar Mixing at Subgrid-Scales

Turbulent Scalar Mixing in a Skewed Jet in Crossflow: Experiments and Modeling

Reynolds-Stress Model Prediction of 3-D Duct Flows

Stochastic Shell Model for Turbulent Mixing of Multiple Scalars with Mean Gradients and Differential Diffusion

Evaluations of SGS Combustion, Scalar Flux and Stress Models in a Turbulent Jet Premixed Flame

Eulerian Quadrature-Based Moment Models for Dilute Polydisperse Evaporating Sprays

Analysis of Algebraic Closures of the Mean Scalar Dissipation Rate of the Progress Variable Applied to Stagnating Turbulent Flames

Generalised Langevin Model in Correspondence with a Chosen Standard Scalar-Flux Second-Moment Closure