Abonnement à la biblothèque: Guest
Page d'accueil ICHMT DL Année en cours Archives Comité de direction Centre international pour le transfert de chaleur et de masse

h-ADAPTIVE FINITE ELEMENT SOLUTION OF NATURAL CONVECTION IN AN AIR FILLED CAVITY

D. A. Mayne
School of Civil and Environmental Engineering, University of Edinburgh, The Kings Buildings Edinburgh EH9 3JN, UNITED KINGDOM

A. S. Usmani
School of Civil and Environmental Engineering, University of Edinburgh, The Kings Buildings Edinburgh EH9 3JN, UNITED KINGDOM

M. Crapper
School of Civil and Environmental Engineering, University of Edinburgh, The Kings Buildings Edinburgh EH9 3JN, UNITED KINGDOM

Résumé

An h-adaptive finite element code for solving coupled Navier-Stokes and energy equations is used to solve natural convection in an air filled cavity with three different directions chosen for gravity. The buoyancy forces are represented using the Boussinesq approximation. This problem is characterised by very thin boundary layers at high values of Rayleigh number (> 106). This is where the auto-adaptive finite element method provides a powerful means of achieving optimal solutions without having to pre-define a mesh, which may be either inadequate or too expensive. The use of h-adaptivity, based on a-posteriori error estimation is found to ensure an accurate problem solution at a reasonable computational cost. Accurate values of Nusselt number are achieved at lower Rayleigh numbers however the three-dimensional nature of the flow for the bottom heated case precludes solution of the problem using two-dimensional modelling.

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