Thermal Conductivity of Methane at Atmospheric Pressure in the Temperature Range of 360-1275 K

[+] Author and Article Information
R. Afshar, A. C. Cogley, S. C. Saxena

Department of Energy Engineering, University of Illinois at Chicago Circle, Chicago, IL 60680

J. Heat Transfer 102(1), 163-167 (Feb 01, 1980) (5 pages) doi:10.1115/1.3244230 History: Received July 07, 1978; Online October 20, 2009


Thermal conductivity of a research grade pure methane sample is measured in a hot-wire column instrument in the temperature range 360–1275 K from heat transfer rate data taken in the continuum region. The results are correlated by a quadratic polynomial in temperature viz., k(T) = −23.35 + 0.1698T + 1.893 × 10−5 T2 . Here k is in m W/m-K and T in K. The experimental data are compared with the available conductivity values and with the predictions of kinetic theories of polyatomic gases in conjunction with realistic intermolecular potentials. The conductivity data are also employed to compute the diffusion coefficient for vibrational energy. The effect of gaseous radiative transfer on the measured thermal conductivity of methane is estimated by comparing the conductivity coefficients of a slab of gas with and without the presence of the absorption bands.

Copyright © 1980 by ASME
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