Fluid model equations for the tokamak plasma edge

Journal Article · Fri Nov 01 04:00:00 EST 1991 · Physics of Fluids B; (United States)

DOI:https://doi.org/10.1063/1.859793· OSTI ID:5021524

Vold, E L; Najmabadi, F; Conn, R W ^[1]

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1. Institute of Plasma and Fusion Research, University of California, Los Angeles, California (USA)

Increasing evidence that the edge plasma plays a crucial role in global tokamak confinement motivates this study of two-dimensional (2-D) ({theta},{ital r}) computational models of fluid transport in the edge plasma region. Fluid plasma equations, boundary conditions, and a coupled neutral--plasma model are developed assuming toroidal symmetry. A plasma potential equation is presented for consistent drift flow solution in the nonambipolar case. Simplified plasma equations are implemented in a 2-D computational model. Results show large poloidal flux dominated by drift flow near the separatrix and parallel flow near the tokamak divertor target. Simultaneously large poloidal gradients in plasma potential and electric fields are seen. These may play a role in driving observed turbulent fluctuations in the edge plasma.

• OSTI ID: 5021524
• Journal Information: Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 3:11; ISSN 0899-8221; ISSN PFBPE
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700103 -- Fusion Energy-- Plasma Research-- Kinetics
ANNULAR SPACE
BOUNDARY CONDITIONS
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFIGURATION
CONFINEMENT
COUPLING
DIVERTORS
ELECTRIC FIELDS
END EFFECTS
EQUATIONS
FLUCTUATIONS
MAGNETIC FIELD CONFIGURATIONS
PLASMA
PLASMA CONFINEMENT
PLASMA DRIFT
PLASMA SIMULATION
POTENTIALS
SIMULATION
SPACE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TOROIDAL CONFIGURATION
TURBULENCE
TWO-DIMENSIONAL CALCULATIONS
VARIATIONS