Thermal conductivity and effective diffusion coefficient for vibrational energy: oxygen (400–1600 K)

Abstract

The thermal conductivity of 99·99 per cent pure oxygen is measured in the conductivity column instrument in the temperature range of 400 to 1600 K from heat transfer data taken in the continuum regime. The results are represented by a cubic polynomial in temperature, viz. k (T)/(mW m^-1 K)^-1 = 4·516 + 8·090 × 10^-2(T/K - 2·300 × 10^-5(T/K ² + 6·862 × 10^-9(T/K)>³ within an average absolute and maximum deviations of 0·64 and 1·9 per cent respectively. These data are compared with the measurements and correlations of earlier workers and with the predictions of various theories developed for polyatomic gases. Average values of the vibrational energy diffusion coefficient, D _vib, are obtained on the basis of present conductivity data as a function of temperature.