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Author: Roger A. Svehla Publisher: ISBN: Category : Gases at high temperatures Languages : en Pages : 132
Book Description
Viscosities and thermal conductivities, suitable for heat-transfer calculations, were estimated for about 200 gases in the ground state from 100° to 5000° K and 1-atm pressure. Free radicals were included, but excited states and ions were not. Calculations for the transport coefficients were based upon the Lennard-Jones (12-6) potential for all gases. Intermolecular force constants for this potential were obtained from experimental viscosity data or were estimated when data were not available. The same set of constants was used to calculate both viscosity and conductivity. An Eucken-type correction for exchange between internal and translational energies was made for thermal conductivities of polyatomic gases.
Author: P. I. Shuspianov Publisher: ISBN: Category : Languages : en Pages : 39
Book Description
The thermal conductivity of air and nitrogen was found subject to a linear dependence from 100C to 200C. The dependence of the coefficients of thermal conductivity of the investigated gases on temperature is subject, with an error not exceeding 0.40%, to the Sutherland law. The absolute value of the extrapolated coefficient of thermal conductivity of air at 0C for narrow tubes is very close to the coefficient obtained by Timrot and Vargaftik, and coincides with the coefficient found by S. Weber. The coefficient obtained for wide tubes is close to the value given by Schneider.
Author: N. B. Vargaftik Publisher: ISBN: Category : Heat Languages : en Pages : 218
Book Description
The report represents a systematized and critical survey of the basic experimental data for the most widely studied substances in liquid and gaseous states (for helium, neon, argon, krypton, xenon, hydrogen, nitrogen, oxygen, air, carbon dioxide, ammonia, ten hydrocarbons, carbon tetrachloride, ethyl alcohol and water). Tables of the most reliable values of the thermal conductivity of all the cited substances in a wide range of temperatures and pressures have been compiled. (Author).