Large eddy simulation of turbulent thermal convection using a mixed scale diffusivity model
type: Item
instance of: scholarly article
title: Large eddy simulation of turbulent thermal convection using a mixed scale diffusivity model
zbMATH Open document ID: 1189.76320
DOI: 10.1504/PCFD.2006.009481
author: P. Joubert
author: Anne Sergent
author: Patrick Le Quéré
published in: Progress in Computational Fluid Dynamics
publication date: 2010-06-28T00:00:00Z
review text: Summary: The Mixed Scale Diffusivity Model, originally developed in the case of the differentially heated cavity, is applied to compute turbulent Rayleigh-Benard flow in an infinite fluid layer at \(\text{Pr} = 0.71\) for a large range of Rayleigh numbers (\(6.3 \times 10^5 - 2 \times 10^{11}\)). The effect of this SGS modelling, which adjusts locally the SGS diffusivity to the thermal scales of the flow and results in variable PrSGS like the dynamic approach, is emphasised by comparison with LES and TRANS literature data. A single scaling regime is found in a range of Rayleigh numbers \(6.3 \times 10^5 - 2 \times 10^{10}\), whose properties include the \(\text{Ra}^{0.302}\) scaling law for the Nusselt number and for the thermal boundary layer thickness, in agreement with the experimental correlation of Niemela et al. (2000). The first indication of a transition towards a new regime appears above \(\text{Ra} = 10^{11}\).
Mathematics Subject Classification ID: 76F65
Mathematics Subject Classification ID: 76F35
Mathematics Subject Classification ID: 76M20
zbMATH DE Number: 5727160
zbMATH Keywords: thermal convection
zbMATH Keywords: Rayleigh-Bénard
zbMATH Keywords: turbulence modelling
zbMATH Keywords: large eddy simulation
zbMATH Keywords: CFD
zbMATH Keywords: computational fluid dynamics
zbMATH Keywords: turbulent flows
MaRDI profile type: Publication
full work available at URL: pcfd.2006.009481
OpenAlex ID: W2066376603
description: scientific article; zbMATH DE number 5727160