Results 261 to 270 of about 32,008 (307)

The FJO thermal diffusion column theory and the thermal diffusion factor

Journal of Physics A: General Physics, 1971
It is shown that by proper choice of a reference temperature in the theoretical expression for the separation factor for a thermal diffusion column, the separation factor may be made to depend on the potential model and the interaction parameters solely through the thermal diffusion factor, the other terms in the expression becoming independent of the ...
J M Saviron, M A Hidalgo, J C Yarza, D Gonzalez-Alvarez   +3 more
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Mass and Thermal Diffusivity Algorithms

Annals of the New York Academy of Sciences, 2002
Abstract: Mass and thermal diffusivity measurements conducted on Earth are prone to contamination by uncontrollable convective contributions to the overall transport. Previous studies of mass and thermal diffusivities conducted on spacecraft have demonstration the gain in precision, and lower absolute values, resulting from the reduced convective ...
R Michael, Banish, Lyle B J, Albert, Timothee L, Pourpoint, J Iwan D, Alexander, Robert F, Sekerka   +4 more
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Diffusion and Thermal Diffusion in Ne–CO2

The Physics of Fluids, 1961
Values of the thermal diffusion factor αT and the ordinary diffusion coefficient D for Ne–CO2 mixtures have been measured over a temperature range of about −78° to 350°C by using the radioactive tracer C14O2. The thermal diffusion factor exhibits an unusual negative temperature dependence similar to that for Ar–CO2 mixtures.
Stanley Weissman, S. C. Saxena, E. A. Mason   +2 more
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Thermal Diffusion and Self-Diffusion in Ammonia

The Journal of Chemical Physics, 1966
The temperature dependence of the isotopic thermal-diffusion factor α0 for ammonia has been investigated with the help of an equimolar mixture of 14NH3 and 15NH3. A 10-tube metal swing-separator as well as a two-bulb glass apparatus were used for these measurements.
R. Paul, W. W. Watson
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"Thermal diffusion"

Tidligere referanse: 8 ...
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Thermal Conductivity and Thermal Diffusivity

1983
Abstract This chapter presents basic principles and the theoretical results of heat transport in solids. Thermal conductivity and thermal diffusivity are the principal properties discussed. Discussions are also included on the effects of temperature, magnetic field, and metallurgical variations caused by composition, processing, and heat-
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Diffusion and Thermal Diffusion of Isotopic Gases

The Journal of Chemical Physics, 1953
The thermal diffusion ratio, RT, for argon and neon isotopes is known to be a linear function of lnT over a considerable temperature range. It is shown that d lnD/d lnT must also be approximately linear in lnT, and that the diffusion coefficient, D, should therefore obey an empirical equation of the form D=αT(β+γlnT),where α, β, γ are constants ...
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Thermodynamics of Thermal Diffusion: Thermal Diffusion in Liquids and Thermal Diffusion in Gasses

1988
Jeong-long Lin, William Taylor
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Thermal diffusivity of

Proceedings of the 10th international conference on photoacoustic and photothermal phenomena, 1999
D. M. Todorovic, D. Vasiljevic-Radovic, A. I. Bojicic, V. B. Pavlovic, B. D. Stojanovic, M. M. Ristic   +5 more
openaire   +1 more source

Development of quartz glass as a certified reference material for thermal diffusivity measurements

International Journal of Thermal Sciences, 2021
Mu Li, Megumi Akoshima, N Yamada
exaly