Fluid model equations for the tokamak plasma edge
نویسنده
چکیده
Increasing evidence that the edge plasma plays a crucial role in global tokamak continement motivates this study of two-dimensional (2-D) (0,~) 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 polo&l gradients in plasma potential and elestric fields are seen. These may play a role in driving observed turbulent fluctuations in the edge plasma.
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