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

ASSESSMENT OF DISCRETE ORDINATES METHOD FOR RADIATIVE TRANSFER IN YLINDRICAL FURNACES

DOI: 10.1615/ICHMT.1997.IntSymLiqTwoPhaseFlowTranspPhenCHTRadTransfProc.160
page 16

Nevin Selcuk
Chemical Engineering Department, Middle East Technical University, 06531 Ankara, Turkey

Nuray Kayakol
Bosch Sanayi ve Ticaret A.S. Diesel Systems / Engineering Injectors Nozzles Organize Sanayi Bolgesi

Abstrakt

The solution accuracy of Sn or Discrete Ordinates Method (DOM) was assessed by comparing its predictions with exact solutions reported earlier on a cylindrical enclosure problem with steep temperature gradients. The enclosure has interior black walls and an absorbing-emitting medium of constant properties. Predictive accuracy was investigated for two angular quadrature schemes: 1) the Sn discrete ordinates approximation ( S2 and S4 ) and 2) the modified piecewise constant angular (PCA) approximation. Comparative testing shows that all predictions agree well with the exact solutions and that Sn approximations produce slightly better accuracy than the modified PCA approximation in radiative heat flux densities. The sensitivity of the predictions of the DOM to radiative properties was also examined by performing calculations for various absorption coefficients. Comparative testing shows that the discrepancies between the predictions increase with the coefficient and hence the accuracy of a radiation model should be tested in isolation from radiative property estimation.

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