Self-Consistent Chemical Model of Partially Ionized Hydrogen Plasmas: Electrical Conductivity

2007 ◽  
Vol 47 (4-5) ◽  
pp. 248-252 ◽  
Author(s):  
Yu. V. Arkhipov ◽  
F. B. Baimbetov ◽  
A. E. Davletov
Keyword(s):  
Electrical Conductivity ◽  
Chemical Model ◽  
Hydrogen Plasmas ◽  
Self Consistent ◽  
Partially Ionized

Self-consistent chemical model of partially ionized plasmas

2011 ◽  
Vol 83 (1) ◽  
Author(s):  
Yu. V. Arkhipov ◽  
F. B. Baimbetov ◽  
A. E. Davletov
Keyword(s):  
Chemical Model ◽  
Ionized Plasmas ◽  
Self Consistent ◽  
Partially Ionized Plasmas ◽  
Partially Ionized

scholarly journals Dynamics of Alfvén waves in partially ionized astrophysical plasmas

2009 ◽  
Vol 76 (3-4) ◽  
pp. 305-315 ◽  
Author(s):  
DASTGEER SHAIKH
Keyword(s):  
Energy Transfer ◽  
Fluid Model ◽  
Propagation Speed ◽  
Neutral Atoms ◽  
Astrophysical Plasmas ◽  
Exchange Processes ◽  
Consistent Model ◽  
Self Consistent ◽  
Partially Ionized ◽  
Energy Equations

AbstractWe develop a two dimensional, self-consistent, compressible fluid model to study evolution of Alfvenic modes in partially ionized astrophysical and space plasmas. The partially ionized plasma consists mainly of electrons, ions and significant neutral atoms. The nonlinear interactions amongst these species take place predominantly through direct collision or charge exchange processes. Our model uniquely describe the interaction processes between two distinctly evolving fluids. In our model, the electrons and ions are described by a single-fluid compressible magnetohydrodynamic (MHD) model and are coupled self-consistently to the neutral fluid via compressible hydrodynamic equations. Both plasma and neutral fluids are treated with different energy equations that adequately enable us to monitor non-adiabatic and thermal energy exchange processes between these two distinct fluids. Based on our self-consistent model, we find that the propagation speed of Alfvenic modes in space and astrophysical plasma is slowed down because these waves are damped predominantly due to direct collisions with the neutral atoms. Consequently, energy transfer takes place between plasma and neutral fluids. We describe the mode coupling processes that lead to the energy transfer between the plasma and neutral and corresponding spectral features.

Measurement of the Electrical Conductivity of Partially Ionized Xenon Produced by Shock Waves

1970 ◽  
Vol 29 (5) ◽  
pp. 1400-1401 ◽  
Author(s):  
Yuji Enomoto ◽  
Noriaki Goda ◽  
Seishiro Hashiguchi
Keyword(s):  
Electrical Conductivity ◽  
Shock Waves ◽  
Partially Ionized

The Effects of Hall and Ion Slip on the Electrical Conductivity of Partially Ionized Gases for Magnetohydrodynamic Re-Entry Vehicle Application

1962 ◽  
Vol 84 (2) ◽  
pp. 177-184 ◽  
Author(s):  
M. J. Brunner
Keyword(s):  
Electrical Conductivity ◽  
Cross Sections ◽  
Effective Conductivity ◽  
Ionized Gas ◽  
Equilibrium Conditions ◽  
Degree Of Ionization ◽  
Slip Effects ◽  
Wide Range ◽  
Ion Slip ◽  
Partially Ionized

The presence of a partially ionized gas around a hypersonic vehicle permits the application of magnetohydrodynamic (MHD) devices during re-entry. The operation of such MHD devices on a re-entry vehicle will largely depend on the magnitude of the electrical conductivity of the gas between the electrodes. In some cases it may be necessary to seed the air in order to insure high conductivity. The operation of the re-entry vehicle at relatively low gas densities and high magnetic fields will produce Hall and ion slip effects which may materially reduce the effective conductivity between the electrodes. The electrical conductivity including Hall and ion slip effects for air is presented for a wide range of pressures and temperatures and for a typical re-entry vehicle, with and without seeding. The electrical conductivity is evaluated for equilibrium conditions considering the number density and collision cross sections for electrons, neutrals, and ions. The Hall and ion slip effects are evaluated from the degree of ionization, the cyclotron frequency, and the time between collisions for electrons, neutrals, and ions.

scholarly journals The Electrical Conductivity of a Partially Ionized Argon-Potassium Plasma in a Magnetic Field

1966 ◽  
Vol 21 (9) ◽  
pp. 1468-1470 ◽  
Author(s):  
W. Feneberg
Keyword(s):  
Magnetic Field ◽  
Electrical Conductivity ◽  
Laguerre Polynomials ◽  
Lorentz Gas ◽  
Small Deviations ◽  
Starting Point ◽  
Potassium Plasma ◽  
Partially Ionized ◽  
Ramsauer Effect ◽  
The Magnetic Field

In the case of small deviations from thermal equilibrium the second ENSKOG approximation is used as a starting point for solving the BOLTZMANN equation of the electrons in a partially ionized plasma. The distribution function is expanded according to LAGUERRE polynomials up to the order of 3. In this order the electrical conductivity of a LORENTZ gas, which is known exactly, is obtained to an accuracy of roughly 5%. The approximation tested in this way was then used to calculate the conductivity of an argon-potassium mixture at electron temperatures between 2000°K and 3500°K.If only he collisions between electrons and argon atoms were to be considered, the electrical conductivity in the absence of a magnetic field would, in view of the RAMSAUER effect, be greater by a factor of 2.8 than that obtained with an infinitely strong magnetic field. When the interaction with the potassium atoms and the COULOMB interaction are taken into account as well the conductivity in the magnetic field varies by about 20%.

Sign in / Sign up

Export Citation Format

Share Document