Suscripción a Biblioteca: Guest
Página principal de la Biblioteca Digital de ICHMT Año actual Archivos Comité Ejecutivo Centro Internacional de Transferencia de Calor y Masa

THREE-DIMENSIONAL CONVECTIONWITHIN A CUBOIDAL POROUS CAVITY DUE TO UNIFORM VOLUMETRIC HEATING

DOI: 10.1615/ICHMT.2015.IntSympAdvComputHeatTransf.1370
pages 1405-1417

D. Andrew S. Rees
Department of Mechanical Engineering, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom

Sinopsis

A cuboidal cavity is filled with a fluid-saturated porous medium which is subjected to a uniform volumetric internal heating where all six boundaries are held at identical constant temperatures. The ensuing free convection is computed using finite difference approximations of the equations written using the velocity-potential/temperature formulation. Both steady and unsteady solvers have been written, and both employ a Full Approximation Scheme multigrid methodology with pointwise Gauss-Seidel smoothing. Our aim is to determine the evolution with Darcy-Rayleigh number, Ra, of the flow and temperature fields within the cavity and how they undergo successive transformations from a steady single-cell pattern at relatively low values of Ra via symmetry-breaking bifurcations to more complicated states. The ensuing free convective flow is visualised by means of heat transfer contours and horizontal velocity vectors at the upper surface. In this preliminary work, attention is confined to a 2 × 2 × 1 cavity and Darcy-Rayleigh numbers which are below 6000. Nevertheless we uncover a variety of competing steady-state solutions.

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