Coaxial radiative and convective heat transfer in gray and nongray gases

Details Coaxial radiative and convective heat transfer in gray and nongray gases Coaxial radiative and convective heat transfer in gray and nongray gases

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jqsrt..24..323m&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 24, Oct. 1980, p. 323-334.

Physics

Axial Flow, Convective Heat Transfer, Gas Flow, Gray Gas, Nongray Atmospheres, Radiative Heat Transfer, Absorption Spectra, Black Body Radiation, Gas Temperature, Greenhouse Effect, Temperature Profiles

Scientific paper

Coupled radiative and convective heat transfer is investigated for an absorbing gas flowing in a finite length channel and heated by blackbody radiation directed along the flow axis. The problem is formulated in one dimension and numerical solutions are obtained for the temperature profile of the gas and for the radiation escaping the channel entrance, assuming both gray and nongray absorption spectra. Due to radiation trapping, the flowing gas is found to have substantially smaller radiation losses for a given peak gas temperature than a solid surface that is radiatively heated to this temperature. A greenhouse effect is also evident whereby radiation losses are minimized for a gas having stronger absorption at long wavelengths.

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