Abo Bibliothek: Guest
ICHMT DL Home Aktuelles Jahr Archive Vorstand International Centre for Heat and Mass Transfer


DOI: 10.1615/ICHMT.2008.CHT.2330
page 14

Thierry Mare
INSA de Rennes, LGCGM, IUT Saint Malo, France

T. Nguyen
Faculté de génie, Université de Sherbrooke, Sherbrooke, Québec, Canada, J1K 2R1


Convection in a horizontal fluid layer of a binary mixture is studied numerically. The flow is driven by buoyancy force due to externally applied constant temperature difference on the vertical wall of the cavity while the horizontal surfaces are impermeable and adiabatic. A nanofluid is used and the effects of cross phenomena "Soret effect" were considered in the analysis. The flows are found to be dependent of the nanoparticle concentration φ, the Rayleigh number, RT, the Lewis number, Le, the particles to thermal buoyancy ratio, φ, and the thermal boundary conditions. Numerical results for finite amplitude convection, obtained by solving numerically the full governing equations, are found to be in good agreement with the analytical solution based on the scale analysis approach.
We have proposed a modified formulation of the conservation equations governing the flow and heat transfer of nanofluids, taking into account important changes of nanofluid thermal conductivity and viscosity as well as the spatial change of particle concentration that is induced by Soret effect. Results have shown that such an effect increases nanofluids heat transfer. The optimal particle volume concentration, which maximizes heat transfer, is estimated to be 2%. The increase in natural convection is weak in comparison to what was found in forced convection.

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