# Preduction of transport properties of gases using classical nonspherical models [electronic resource].

- Published:
- Ames, Iowa : Ames Laboratory, 1976.

Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- Pages: 191 : digital, PDF file
- Additional Creators:
- Ames Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

##### Access Online

- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- The general formulation of the classical kinetic theory, which is needed to predict transport properties of gases in situations where the hydrodynamic equations are valid, is reviewed. A rigid convex model of tetrahedral symmetry is used to predict the Senftleben-Beenakker effect of a static magnetic field on the thermal conductivity and viscosity of pure CH/sub 4/, CD/sub 4/ and CF/sub 4/. The parameters of the model are optimized and are found to assume physically reasonable values. The calculations agree with experiment to a degree comparable to that of similar work on diatomic molecules. A generalized scattering cross section, ..gamma.., is defined which can be evaluated exactly for the limiting cases of a spherical soft potential and rigid ovaloids. For a general soft nonspherical interaction of the Kihara type, a suitable approximation for the momentum dependence is made with the following attributes: ..gamma.. reduces to the form for soft sphere and rigid ovaloid in the limits and the resulting matrix elements of the collision operator can be written in terms of the familiar ..cap omega..* integrals. This formulation is used to investigate thermal diffusion in binary isotopic mixtures of CO. Calculations are made in an 80/sup 0/K to 300/sup 0/K range which includes the inversion temperatures for all mixtures studied. Thermal conductivity and diffusion coefficients of CO are also calculated. The parameters of the model can be adjusted to account for the major features of the experimental data. The physical significance of the parameters is discussed. (auth)
- Report Numbers:
- E 1.99:is-t-701

is-t-701 - Subject(s):
- Other Subject(s):
- Carbon Fluorides
- Thermal Conductivity
- Viscosity
- Carbon Monoxide
- Thermal Diffusion
- Gases
- Mathematical Models
- Transport Theory
- Methane
- Boltzmann Equation
- Cross Sections
- Deuterium Compounds
- Hydrodynamics
- Kihara Potential
- Low Temperature
- Magnetic Fields
- Medium Temperature
- Alkanes
- Carbon Compounds
- Carbon Oxides
- Chalcogenides
- Cryogenic Fluids
- Differential Equations
- Equations
- Fluid Mechanics
- Fluids
- Fluorides
- Fluorine Compounds
- Halides
- Halogen Compounds
- Hydrocarbons
- Hydrogen Compounds
- Mechanics
- Organic Compounds
- Oxides
- Oxygen Compounds
- Physical Properties
- Thermodynamic Properties

- Note:
- Published through SciTech Connect.

01/01/1976.

"is-t-701"

Verlin, J.D. - Funding Information:
- W-7405-ENG-82

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