Radiative Transfer in Nontransparent, Dispersed MediaExisting standard textbooks on radiative transfer (RT) are usually confined to theoretical models with little reference to experimental methods. This book has been written to illustrate how calorimetric and spectroscopic measurements can be used to check theoretical predictions on extinction properties of infrared radiation in optically thick, absorbing and scattering particulate media. A determination of infrared extinction coefficients is now possible from three completely independent methods. An interpretation of the results of thermal conductivity measurements is made in terms of the diffusion model of RT. One of the most important topics of the book is the experimental separation of heat transfer modes. Since all modes other than scattered radiation are coupled by temperature profiles, conservation of energy also requires an understanding of the non-radiative heat flow components. Unlike other volumes on RT, this book also contains a review of non-radiative heat flow mechanisms. Thus the book does not treat RT as an isolated phenomenon but stresses the key role of RT among the other transport processes. A considerable part of the book is devoted to the calculation of extinction cross sections by application of Mie theory, anisotropic and dependent scattering, optimization of radiation extinction by experimental means, existence or non-existence of thermal conductivity, and other general questions within the field of thermophysics. |
Contents
General Introduction into the Determination | 1 |
Quantities Needed to Formulate the Equations | 29 |
Approximate Solutions of the Equation of Transfer | 96 |
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Common terms and phrases
absorbing absorption aerogel albedo anisotropic scattering applied approximation assumed borosilicate glass borosilicate glass fibres Büttner calculated calorimetric Caps cell models CExt Cond constant Cont continuum cylindrical particles denotes density dependent scattering dielectric diffusion model dimensionless dispersed media emitted equation of transfer experimental extinction coefficient extinction cross section factor five-flux fumed silica gas pressure gases glass fibres heat flow components heat transfer heat transfer modes increases isotropic Kaganer kg/m³ linear measured medium method Mie theory N₁ nontransparent media opacifiers optical thickness parameter particle diameter perature powder pure QExt radiative flow radiative heat flow radiative transfer Rcont refractive index rigorous Mie theory scattering parameter Siegel and Howell Silica aerogel solution spectral spherical particles substances surface T₁ temperature dependence temperature profile thermal conductivity thermal insulation Tien tion total heat flow total thermal conductivity transmission transparent ture two-flux model values Viskanta wave wavelength yields
References to this book
Encyclopedia of Surface and Colloid Science - Volume III Arthur T. Hubbard No preview available - 2002 |
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