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  • 1
    Electronic Resource
    Electronic Resource
    The transverse instability in a differentially heated vertical cavity filled with molecular radiating gases. I. Linear stability analysis (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 13 (2001), S. 1492-1507 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Radiation effects on the onset of the transverse instability in a differentially heated vertical cavity containing molecular emitting and absorbing gases in the so-called conduction regime is studied theoretically. Radiative transfer is treated using the full integro-differential formulation. The neutral stability curves are determined using a combined Galerkin-collocation method based on Chebyshev polynomials. A modified correlated-k model and the absorption distribution function model are used in order to take into account the spectral structure of the absorption coefficient for radiating molecules such as H2O and CO2. For transparent media, perfect agreement is found with the available data reported in the literature and, particularly, the principle of exchange of stability is found to hold for Prandtl number values less than 12.46. The study of gray media allows us to examine the basic mechanisms that yield to the onset of transverse instability as traveling waves. For real radiating gases, a parametric study for H2O and CO2 is reported. It is shown that the radiative transfer delays the onset of the transverse instability and this delay increases with temperature and decreases with boundary emissivities, while layer depth effects depend on the level of saturation of the gas active absorption bands. Whatever the gas considered, it is found that neither radiation effect on the basic flow nor the radiative power disturbances can be neglected. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1358309
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  • 2
    Electronic Resource
    Electronic Resource
    The onset of Rayleigh–Bénard instability in molecular radiating gases (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 9 (1997), S. 3858-3872 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Radiation effect on the onset of Rayleigh–Bénard instability is studied theoretically in the case of real molecular emitting and absorbing gases. Radiative transfer is treated using the full integro-differential formulation without recourse to the differential approximation or to the asymptotic optically thin or optically thick limiting cases. The marginal stability is determined using a combined Galerkin-collocation method based on Chebyshev polynomials. A modified correlated-k (CK) model is developed for NH3, H2O and CO2 in order to take into account the fine spectral structure of the absorption coefficient and of its derivative with respect to temperature. No restrictions are made concerning the nature of the bounding surfaces and their radiative properties. The study of gray media allows us to discuss first the limitations of the differential approximation and the validity range of the optically thin and thick limits. The principle of exchange of stability is found to hold for all the studied cases. For real radiating gases, a reasonable agreement with the few available experimental data which are related to NH3 is first shown and then a parametric study for H2O and CO2 is reported. It is shown that neither radiation effect on the static temperature profile nor the radiative damping of thermal disturbances can be neglected. Radiation effects on the delay of instability onset increase with temperature, layer depth, and decrease with boundary emissivities. Pressure effects depend on the level of saturation of gas active absorption bands. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.869486
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  • 3
    Electronic Resource
    Electronic Resource
    Validity of band-model calculations for CO"2 and H"2O applied to radiative properties and conductive-radiative transfer
    Amsterdam : Elsevier
    Journal of Quantitative Spectroscopy and Radiative Transfer 33 (1985), S. 243-257 
    Details
    ISSN: 0022-4073
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-4073(85)90154-2
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  • 4
    Electronic Resource
    Electronic Resource
    Measurements and calculations of CO-H"2O line-widths at high temperature
    Amsterdam : Elsevier
    Journal of Quantitative Spectroscopy and Radiative Transfer 37 (1987), S. 205-206 
    Details
    ISSN: 0022-4073
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-4073(87)90023-9
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  • 5
    Electronic Resource
    Electronic Resource
    Correlated-k and fictitious gas methods for H"2O near 2.7 μm
    Amsterdam : Elsevier
    Journal of Quantitative Spectroscopy and Radiative Transfer 48 (1992), S. 187-203 
    Details
    ISSN: 0022-4073
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-4073(92)90088-L
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  • 6
    Electronic Resource
    Electronic Resource
    Diode-laser measurements and calculations of Co-Co"2 line-widths at high temperature
    Amsterdam : Elsevier
    Journal of Quantitative Spectroscopy and Radiative Transfer 39 (1988), S. 441-444 
    Details
    ISSN: 0022-4073
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-4073(88)90089-1
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  • 7
    Electronic Resource
    Electronic Resource
    Structure of diffusion and premixed laminar counterflow flames including molecular radiative transfer (1993)
    Springer
    Combustion, explosion and shock waves 29 (1993), S. 306-311 
    Details
    ISSN: 1573-8345
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The interaction between radiation and combustion is studied theoretically in the case of strained counterflow nonluminous laminar flames. Both H2−O2 diffusion and C3H8-air premixed flames are considered. Calculations are based on detailed chemical kinetics and narrow-band statistical modeling of infrared radiative properties. It is shown that radiative transfer decreases the temperature level, which affects particularly the production and consumption of minor species and pollutants. For H2−O2 flames, a low strain rate extinction limit due to radiation is found. It is also shown that the commonly used approximation of optically thin medium is inaccurate, even for the small-scale laboratory flames considered here.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00797647
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