Library Subscription: Guest
ICHMT DL Home Current Year Archives Executive Committee International Centre for Heat and Mass Transfer

RANS Modelling of Turbulent Heat Transfer in Moderate Prandtl Number Fluids

DOI: 10.1615/THMT-18.360
pages 375-386

D. Sarno
School of Mechanical, Aerospace and Civil Engineering, University of Manchester

Timothy J. Craft
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, PO Box 88, Manchester M13 9PL, UK

Hector Iacovides
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering. The University of Manchester, Manchester M13 9PL, U.K.

A. Nasser
School of Mechanical, Aerospace and Civil Engineering, University of Manchester

Abstract

The paper analyses the performance of several low-Reynolds number turbulence models with moderate Prandtl number fluids (100 < Pr < 101) for forced and mixed convection cases. The turbulence models tested include well-used variations of the k-ε eddy viscosity model, and Reynolds stress transport models. For forced convection the results show that the turbulence models perform very similarly to each other at a Prandtl number of 0.71, however for increasingly high Prandtl numbers the results show significant spread in performance. This spread is due to the very-near wall predictions of turbulence levels, which become much more influential on the thermal field at higher Prandtl numbers. For mixed convection buoyancy-aided flow the increase in spread is significantly less than for forced convection due to laminarisation of buoyancy aided flow, whereas for buoyancyopposing flow the spread in model performance at higher Prandtl number is similar to that in forced convection, with only a slight decrease in spread with larger buoyancy forces.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH