MOLECULAR DIFFUSION

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Abstract:

The Chapman-Enskog method of correcting the velocity distribution function is found to be applicable in the case of the mutual diffusion of two neutral gases and also in the case of diffusion of ions in a neutral gas under the influence of an electric field. In both cases, the diffusion cross section may be calculated according to classical theory and quantum theory. The theoretical predictions are compared with experimental data. Data are included for drift velocities of various ions as a function of field strength divided by pressure. The interaction of diffusing ions of different sign is investigated. An AMBIPOLAR DIFFUSION COEFFICIENT MAY BE DEFINED WHEN THERE IS NO MAGNETIC FIELD PRESENT AND THE PLASMA CONDUCTIVITY IS EITHER SMALL OR LARGE. Author

Author(s):
Papa, R.
Author Organization(s):
GEOPHYSICS CORP OF AMERICA BOSTON MA
Pagination:
0001

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
GCA-TR-61-6-A, AFCRL-106
Contract/Grant Number(s):
AF19 604 7405
Monitor Series:
106
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*DIFFUSION, *MOLECULES, ELECTRIC FIELDS, IONS, QUANTUM THEORY
Report Date:
1960 Jan 01