Thermal Conductivity of Binary Mixtures of Diatomic and Monatomic Gases

Abstract

Thermal conductivity of the binary mixtures of O2–He, O2–Ne, O2–Kr, and O2–Xe have been measured at 30°C and 45°C for various compositions by using the thick-wire-variant of the hot-wire method. For pure O2 the experimental value of the thermal conductivity is lower than that given by the recent theory of Hirschfelder based on the assumption of local chemical equilibrium, and consequently the values calculated from Hirschfelder's formula for the mixture conductivities are also expected to be higher than the experimental values which is actually found to be so for the mixtures investigated here. The agreement becomes excellent when the experimental values of the conductivity of pure O2 are used to calculate the mixture conductivities. The formula for the mixture conductivities has been tested in detail and was found to give satisfactorily the composition dependence. The simpler formula for the thermal conductivity of gas mixtures given by Mason and Saxena has also been tested.

Thermal stability of the human body under hyperbaric environmental conditions: a theoretical study

“…In the above equations m 0 and k 0 are kinematic viscosity and thermal conductivity respectively of the atmospheric air at sea level, q the density, a the thermal diusivity, g the absolute viscosity and c p the speci®c heat of the gas or gas mixtures. The numerical values of k and m are given in Table 2 (Srivastava and Barna 1960;Wargaftik 1972). Rapp (1970) has also described the ratio between the evaporative heat transfer coecient (h e ) at the interface between the body and a gas underwater and the same parameter at sea level in atmospheric air:…”

Property value estimation for inhaled therapeutic binary gas mixtures: He, Xe, N2O, and N2 with O2

“…Figure 7 shows comparisons of experimental thermal conductivity values [17] for helium-oxygen and xenon-oxygen mixtures at 30°C compared to theoretical values calculated using Equation (8). The maximum relative differences between the theory and experiment are 4.2% at X He = 0.68 and 4.7% at X Xe = 0.27, respectively.…”

“… Thermal conductivity at 30°C for He-O 2 and Xe-O 2 mixtures using Equation (8), based on a weighted average of the molar fractions and from experimental measurements [17]. …”

“…Other equilibrium and transport properties have been extrapolated from the viscosity measurements using the models described above [8,9]. There also exists limited thermal conductivity data measured using a hot wire method [17]. …”

Molecular Transport Properties of Fluids. Chemical Engineering Fundamentals Review

“…and 0" to 1200" C. H e showed that the simple mixing law using partial pressures was within 2% of the more complicated calculation of Buddenberg and Wilke. by (66, 105) three methods 20" and 4 5 O C. ; thick wire method (97) 30' and 4 5 O C.; Hirschfelder theory, (13) 30' and 45' C. Exptl., 270' C. ; calcd., 20O0-15OO0 K. (30) Exptl., 29 ' and 520' C.; also calcd.…”