10.9 TOTAL EMlSSIVlTY AND MEAN ABSORPTION COEFFICIENT 339
On the other hand, in the work of Marin and Buckius [105-107] explicit (albeit cumbersome) ex-
pressions are given for k(g), which approximate the wide band k—distributions obtained from the
HITEMP

CHAPTER
10
RADIATIVE
PROPERTIES OF
MOLECULAR GASES
10.1 FUNDAMENTAL PRINCIPLES
Radiative transfer characteristics of an opaque wall can often be described with good accuracy
by the very simple model of gray and diffuse emission, absorption, and reﬂectio

HEAT TRANSFER
HEAT TRANSFER
RADIATION TABLES AND GRAPHS
RADIATION
1
TABLES AND GRAPHS
HEAT TRANSFER
View factors for geometries that are infinitely long in the direction
perpendicular to the plane of the paper.
RADIATION
2
TABLES AND GRAPHS
HEAT TRANSFER

Radiation: Processes and
Properties
Surface Radiative Properties
Chapter 12
Sections 12.4 through 12.7
Presented by R. Ben-Mansour
Emissivity
Surface Emissivity
Radiation emitted by a surface may be determined by introducing a property
(the emissivity) t

Absorption and Emission in
Participating Media
ME535-142
R Ben-Mansour
Overview
- Introduction
- Spectral Lines and Bands for gas absorption
and emission
- Band Models and Correlations
- Total Gas Emittance Correlations
- True absorption Coefficient
- Rad

Chapter 13.
Modeling Heat Transfer
This chapter provides details about the heat transfer models available in FLUENT.
Information is presented in the following sections:
Section 13.1: Introduction
Section 13.2: Modeling Conductive and Convective Heat Tra

Radiation: Processes and
Properties
Basic Principles and DefinitionsChapter 12
Sections 12.1 through 12.3
ME535-142-SL1
General Considerations
General Considerations
Attention is focused on thermal radiation, whose origins are associated
with emission fr

PROBLEM 12.1
KNOWN: Rate at which radiation is intercepted by each of three surfaces (see (Example 12.1).
2
FIND: Irradiation, G[W/m ], at each of the three surfaces.
SCHEMATIC:
ANALYSIS: The irradiation at a surface is the rate at which radiation is inci

PROBLEM 12.11
KNOWN: Diffuse surface Ao, 5-mm square, with total emissive power Eo = 4000 W/m2.
FIND: (a) Rate at which radiant energy is emitted by Ao, qemit; (b) Intensity Io,e of the radiation field
emitted from the surface Ao; (c) Expression for qemit