MOLECULAR DIFFUSION

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)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1961
Accession Number
AD0252535

Entities

People

  • R. Papa

Tags

DTIC Thesaurus Topics

  • Coefficients
  • Conductivity
  • Diffusion
  • Diffusion Coefficient
  • Distribution Functions
  • Electric Fields
  • Experimental Data
  • Magnetic Fields
  • Physical Properties
  • Quantum Mechanics

Fields of Study

  • Physics

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Plasma Physics.

Technology Areas

  • Quantum Computing