Correlation of Absorption by Water Vapor at Temperatures from 300°K to 1100 K

Edwards, D. K.; Flornes, B. J.; Glassen, L. K.; Sun, Wenyi

doi:10.1364/ao.4.000715

Cited by 43 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This necessitates the development of approximate methods which reduce the number of RTE solutions required. Band models [121][122][123][124][125][126][127][128][129] accomplish this by defining contiguous wavelength intervals with similar optical properties together and making some assumption on how the properties vary within a given band. The k-distribution [130][131][132][133][134][135][136][137][138][139][140], spectral-line-weighted (SLW) sum-of-gray gases [141][142][143][144][145][146], and cumulative wavenumber (CW) [144,145,147,148] methods work by allowing the wavelength intervals that are grouped together to not be contiguous.…”

Section: Inclusion Of Spectral Propertiesmentioning

confidence: 99%

Coupling radiative heat transfer in participating media with other heat transfer modes

Tencer

Howell

2015

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

transfer modes are minimized or eliminated as in Dewar flasks and cryogenic storage systems. In this review, we discuss the common and not-so-common methods for treating radiation heat transfer in participating (absorbing/emitting and scattering) media, and how these methods are coupled with the overall energy equation for treating thermal transfer problems.Because radiation is almost inevitably coupled with other heat transfer modes, an overall thermal analysis requires solution of the energy equation, which is actually a balance of energy rates. Here, we follow the development in Howell et al. [1].The general form for the energy equation for a compressible fluid is where D/Dt is the substantial derivative, the left-hand side accounts for changes in stored energy within the medium, and the terms on the right-hand side account for changes in pressure work, contributions by conduction and radiation, internal sources (chemical, electrical, nuclear, etc.,), and viscous dissipation. In most practical thermal analysis problems, the pressure work and viscous dissipation terms can be neglected.Of greatest interest here is the evaluation of the local divergence of radiative flux, −∇ · q r . This is the difference in the local absorbed radiative energy minus the local emitted radiation, 4π ∞ =0 κ I b d , where κ λ is the local spectral absorptivity of the medium and I λb is the blackbody intensity given by the Planck distribution. In an absorbing-emitting-scattering medium, the absorbed radiative energy is found by first finding the local radiative intensity I λ (Ω), which is defined as the spectral energy propagating in a given direction Ω per unit solid angle, per unit area AbstractThe common methods for finding the local radiative flux divergence in participating media through solution of the radiative transfer equation are outlined. The pros and cons of each method are discussed in terms of their speed, ability to handle spectral properties and scattering phenomena, as well as their accuracy in different ranges of media transport properties. The suitability of each method for inclusion in the energy equation to efficiently solve multi-mode thermal transfer problems is discussed. Finally, remaining topics needing research are outlined.

show abstract

Section: Inclusion Of Spectral Propertiesmentioning

confidence: 99%

Coupling radiative heat transfer in participating media with other heat transfer modes

Tencer

Howell

2015

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

show abstract

“…The OPAL opacities are a few percent higher than the LEDCOP opacities over most of the radiation-dominated interior of the Sun. Edwards et al (1965) summarized measurements of H 2 O band emissivities for T < 1;200 K and presented correlations in terms of a wide-band adaptation of the Mayer-Goody statistical band model using a mean line width to line spacing ratio and spectral band contours calculated in the just-overlapping line model by Gray (1963). Ferriso et al (1966), Ludwig and Ferriso (1967), Boynton and Ludwig (1971), and Ludwig (1971) compare their measurements of hot water vapor emissivity and absorptivity with earlier results.…”

Section: Astrophysical Mixturesmentioning

confidence: 99%