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


DOI: 10.1615/ICHMT.2004.RAD-4.120
8 pages

J.-F. Ripoll
Center for Turbulence Research, Department of Mechanical Engineering, 488 Escondido, Building 500/500A, Stanford University, CA 94305-3035, USA

A. A. Wray
Center for Turbulence Research NASA Ames Research Center


In order to remove the frequency dependence in the radiative transfer equation (RTE), mean absorption coefficients can be introduced and modeled. It will be first shown that the model proposed here for these coefficients is accurate when the frequency dependence is not too strong. The frequency-integrated RTE using these coefficients will be also shown accurate compared to the full RTE. A large range of spectral absorption coefficients, having the form σ = C να, will be tested for a simple 1D slab; α varies between -3, which is the limit value of the model, and 4. The validation of these coefficients allows us to conclude first that the frequency dependence can be modeled in the RTE instead of solving it directly, provided that the spectral coefficient is not too complex or stiff, and that these coefficients will accurately model complex opacities when used in macroscopic radiation models.

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