HIGH TEMPERATURE GASEOUS DIFFUSION EXPERIMENTS AND INTERMOLECULAR POTENTIAL ENERGY FUNCTIONS
Journal Article
·
· Planetary and Space Sci.
A discussion is presented of binary diffusinn data over the temperature range 300 to 1150 deg K for the gas pairs: He-- N/sub 2/, CO/sub 2/-- N/sub 2/, He-- Ar, CO/sub 2/-- O/sub 2/, CH/sub 4/-- C/sub 2/, H/sub 2/ >i-- O/sub 2/, CO-- O/sub 2/, and H/sub 2/O-- O/sub 2/. The data cover a wide enough range in temperature and are of sufficient precision ( approximately - plus or minus 2%) so that it is possible to examine them in terms of the kinetic theory of dilute gases and the intermolecular potential energy functions characterizing birary collision processes. The three functions used for which the necessary collision integrals are evaluated are the inverse power point center of repulsion potential, the Lennard-Jones (12-6) potential, and the modified Buckingham (Exp- 6) potential. In addition, the collision integrals for the exponential point center of repulsion potential were evaluated by numerical means. The high temperature diffusion coefficients predicted from the four potentials fitted at lower temperatures agree rather well. (auth)
- Research Organization:
- Johns Hopkins Univ., Silver Spring, Md.
- NSA Number:
- NSA-15-025339
- OSTI ID:
- 4018055
- Journal Information:
- Planetary and Space Sci., Journal Name: Planetary and Space Sci. Vol. Vol: 3
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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