Numerical Simulation of Unsteady Behavior of Rotary Arc Plasma Under Magnetic Field

2010 ◽  
Author(s):  
Takayasu Fujino ◽  
Satoshi Hirayama ◽  
Motoo Ishikawa ◽  
Tadashi Mori ◽  
Katsuharu Iwamoto ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Numerical Simulation ◽  
Arc Plasma ◽  
Unsteady Behavior

HEXAGON-STRIPE TRANSITION AT THE MAGNETIC FIELD INDUCED PHASE TRANSFORMATIONS OF THE MAGNETORHEOLOGICAL SUSPENSIONS

2002 ◽  
Vol 16 (17n18) ◽  
pp. 2345-2351 ◽  
Author(s):  
A. CEBERS
Keyword(s):  
Magnetic Field ◽  
Numerical Simulation ◽  
Physical Parameters ◽  
Phase Boundaries ◽  
Modulated Phases ◽  
Magnetorheological Suspensions ◽  
Perturbed State ◽  
Magnetorheological Suspension ◽  
The Magnetic Field ◽  
Hele Shaw Cell

The phase diagram of the magnetorheological suspension allowing for the modulated phases in the Hele-Shaw cell under the action of the normal field is calculated. The phase boundaries between the stripe, the hexagonal and the unmodulated phases in dependence on the layer thickness and the magnetic field strength are found. The existence of the transitions between the stripe and the hexagonal phases at the corresponding variation of the physical parameters is illustrated by the numerical simulation of the concentration dynamics in the Hele-Shaw cell. It is remarked that those transitions in the case of the magnetorheological suspensions can be caused by the compression or the expansion of the layer. Among the features noticed at the numerical simulation of the concentration dynamics in the Hele-Shaw cell are: the stripe patterns formed from the preexisting hexagonal structures are more ordered than arising from the initial randomly perturbed state; at the slightly perturbed boundary between the concentrated and diluted phases the hexagonal and the inverted hexagonal phases are formed and others.

Numerical simulation of near-Alfven MHD flows relaxation with a longitudinal magnetic field

2015 ◽  
Vol 81 (3) ◽  
Author(s):  
Evgeniy V. Styopin
Keyword(s):  
Magnetic Field ◽  
Numerical Simulation ◽  
Longitudinal Magnetic Field ◽  
Relaxation Processes ◽  
Plasma Velocity ◽  
Opposite Inequality ◽  
Magnetohydrodynamic Flows ◽  
Longitudinal Plasma ◽  
Nozzle Type ◽  
Alfven Velocity

Stationary magnetohydrodynamics flows in nozzle-type channels in the presence of a longitudinal magnetic field are divided into three significantly different classes: super-Alfven flows in which the longitudinal plasma velocity is higher than the Alfven velocity calculated by a longitudinal magnetic field, sub-Alfven flows – with the opposite inequality, and Alfven flows in which the longitudinal plasma velocity coincides with the Alfven velocity over the entire length of the channel and the plasma density has a constant value. In the present work, stationary Alfven and close to Alfven magnetohydrodynamic flows obtained by using a numerical modeling of their relaxation processes in coaxial channels in the presence of a longitudinal magnetic field are considered.

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