Electric Polarization Caused by a Diffusion Flow in a Polar Gas Mixture

1974 ◽  
Vol 29 (3) ◽  
pp. 373-375
Author(s):  
S. Hess
Keyword(s):  
Simple Model ◽  
Kinetic Theory ◽  
Electric Polarization ◽  
Constitutive Law ◽  
Gas Mixture ◽  
Diffusion Flow ◽  
Collision Integrals ◽  
Thermo Electric ◽  
Previously Treated ◽  
Symmetric Top Molecules

The kinetic theory of the diffusio-electric polarization is developed analogous to the previously treated thermo-electric polarization (Waldmann, Hess 1969). The relevant constitutive law is derived. The characteristic coefficient determining the magnitude of this effect is related to collision integrals obtained from the Waldmann-Snider equation. A simple model calculation shows that this coefficient will be nonzero, in general, and of measurable size, for polar symmetric top molecules

scholarly journals Simulation of a two-dimensional binary gas mixture outflow into vacuum through a thin slit on the basis of direct solution of the Boltzmann kinetic equation

2021 ◽  
Vol 2056 (1) ◽  
pp. 012007
Author(s):  
S S Sitnikov ◽  
F G Tcheremissine ◽  
T A Sazykina
Keyword(s):  
Kinetic Equation ◽  
Boltzmann Kinetic Equation ◽  
Gas Mixture ◽  
Two Dimensional ◽  
Direct Solution ◽  
Steady State Regime ◽  
Collision Integrals ◽  
Flow Formation ◽  
Binary Gas Mixture ◽  
State Regime

Abstract Two-dimensional binary gas mixture outflow from a vessel into vacuum through a thin slit is studied on the basis of direct solution of the Boltzmann kinetic equation. For evaluation of collision integrals in the Boltzmann equation a conservative projection method is used. Numerical simulation of a two-dimensional argon-neon gas mixture outflow from a vessel into vacuum was performed. Graphs of mixture components flow rate dependence on time during the flow formation, as well as fields of molecular density and temperature for steady-state regime, were obtained.

scholarly journals The Formal Nonequilibrium Theory of Partially Ionized and/or Nonuniform Gas Mixtures

1968 ◽  
Vol 21 (5) ◽  
pp. 609 ◽  
Author(s):  
EL Bydder ◽  
BS Liley
Keyword(s):  
Spontaneous Fission ◽  
Distribution Functions ◽  
Stimulated Emission ◽  
Gas Mixture ◽  
Moment Equations ◽  
Collision Integrals ◽  
Velocity Distribution Functions ◽  
Nonequilibrium Theory ◽  
Nonuniform Gas ◽  
Natural Decay

Starting from Boltzmann�like equations, moment equations for a general gas mixture are developed. The equations are closed, and the collision integrals evaluated, by using Grad's 13�moment approximations for the velocity distribution functions. The collision integrals are determined for all possible types of binary encounters, which include recombination and attachment, spontaneous fission and natural decay, charge exchange and elastic collisions, and excitation and fission� and fusion�like processes. The derivation of transport relationships is considered, while the extension of the results to include such direct radiative phenomena as absorption, photoionization, stimulated emission, and Compton scattering is also briefly discussed.

Viscosity of a Polar Gas of Symmetric Top Molecules in Perpendicular Electric and Magnetic Fields

1978 ◽  
Vol 33 (2) ◽  
pp. 225-227 ◽  
Author(s):  
W. E. Köhler
Keyword(s):  
Magnetic Fields ◽  
Kinetic Theory ◽  
Electric Field ◽  
Electric Fields ◽  
Pressure Difference ◽  
Viscosity Coefficients ◽  
Electric And Magnetic Fields ◽  
Symmetric Top Molecules ◽  
Field Influence

A kinetic theory treatment of the influence of perpendicular magnetic and electric fields on the viscosity is given for a polar gas of symmetric top molecules. Expressions for the 9 independent viscosity coefficients are derived. In particular, the electric field influence on the transverse viscomagnetic pressure difference is studied.

Sign in / Sign up

Export Citation Format

Share Document