scholarly journals Plasma transport in stochastic magnetic fields. III. Kinetics of test-particle diffusion

1982 ◽  
Author(s):  
J.A. Krommes ◽  
C. Oberman ◽  
R.G. Kleva
Keyword(s):  
Magnetic Fields ◽  
Test Particle ◽  
Plasma Transport ◽  
Particle Diffusion ◽  
Stochastic Magnetic Fields ◽  
Kinetics Of

Plasma transport in stochastic magnetic fields. Part 3. Kinetics of test particle diffusion

1983 ◽  
Vol 30 (1) ◽  
pp. 11-56 ◽  
Author(s):  
John A. Krommes ◽  
Carl Oberman ◽  
Robert G. Kleva
Keyword(s):  
Magnetic Fields ◽  
Test Particle ◽  
Scaling Laws ◽  
Direct Interaction ◽  
Stochastic Field ◽  
Common Procedure ◽  
Correlation Lengths ◽  
Direct Interaction Approximation ◽  
Stochastic Magnetic Fields ◽  
Autocorrelation Length

A discussion is given of test particle transport in the presence of specified stochastic magnetic fields, with particular emphasis on the collisional limit. Certain paradoxes and inconsistencies in the literature regarding the form of the scaling laws are resolved by carefully distinguishing a number of physically distinct correlation lengths, and thus identifying several collisional subregimes. The common procedure of averaging the conventional fluid equations over the statistics of a random field is shown to fail in some important cases because of breakdown of the Chapman-Enskog ordering in the presence of a stochastic field component with short autocorrelation length. A modified perturbation theory is introduced which leads to a Kubo-like formula valid in all collisional regimes. The direct-interaction approximation is shown to fail in the interesting limit in which the orbit exponentiation length LK appears explicitly. A higher-order renormalized kinetic theory in which LK appears naturally is discussed and used to rederive more systematically the results of the heuristic scaling arguments.

Effects of plasma flows on particle diffusion in stochastic magnetic fields

1996 ◽  
Vol 54 (1) ◽  
pp. 791-799 ◽  
Author(s):  
M. Vlad ◽  
F. Spineanu ◽  
J. H. Misguich ◽  
R. Balescu
Keyword(s):  
Magnetic Fields ◽  
Particle Diffusion ◽  
Plasma Flows ◽  
Stochastic Magnetic Fields

scholarly journals The influence of an external magnetic field on the dynamics of magnetite reduction with hydrogen

RSC Advances ◽  
2021 ◽  
Vol 11 (25) ◽  
pp. 15422-15427
Author(s):  
Petr A. Chernavsky ◽  
Nellie V. Kim ◽  
Victor A. Andrianov ◽  
Yurii D. Perfiliev ◽  
Alla A. Novakova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Hydrogen Reduction ◽  
Kinetics Of

The kinetics of hydrogen reduction of magnetite was investigated in different magnetic fields.

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