Two-dimensional finite element multigroup diffusion theory for neutral atom transport in plasmas
Solution of the energy-dependent diffusion equation in two dimensions is formulated by multigroup approximation of the energy variable and general triangular mesh, finite element discretization of the spatial domain. Finite element formulation is done by Galerkin's method. Based on this formulation, a two-dimensional multigroup finite element diffusion theory code, FENAT, has been developed for the transport of neutral atoms in fusion plasmas. FENAT solves the multigroup diffusion equation in X--Y cartesian and R--Z cylindrical/toroidal geometries. Use of the finite element method allows solution of problems in which the plasma cross section has an arbitrary shape. The accuracy of FENAT has been verified by comparing results to those obtained using the two-dimensional discrete ordinate transport theory code, DOT-4.3. Results of application of FENAT to the transport of limiter-originated neutral atoms in a tokamak fusion machine are presented. copyright 1987 Academic Press, Inc.
- Research Organization:
- Mechanical, Aerospace, and Nuclear Engineering, Department, Center for Plasma Physics and Fusion Engineering, University of California, Los Angeles, Los Angeles, California 90024
- OSTI ID:
- 6452697
- Journal Information:
- J. Comput. Phys.; (United States), Vol. 71:2
- Country of Publication:
- United States
- Language:
- English
Similar Records
User's manual for FENAT: a two-dimensional multigroup diffusion theory Finite Element Neutral Atom Transport code
Application of diffusion theory to the transport of neutral particles in fusion plasmas
Related Subjects
ATOM TRANSPORT
F CODES
PLASMA
TEXTOR TOKAMAK
ENERGY DEPENDENCE
FINITE ELEMENT METHOD
GALERKIN-PETROV METHOD
MULTIGROUP THEORY
TOROIDAL CONFIGURATION
TWO-DIMENSIONAL CALCULATIONS
ANNULAR SPACE
CLOSED PLASMA DEVICES
COMPUTER CODES
CONFIGURATION
ITERATIVE METHODS
NEUTRAL-PARTICLE TRANSPORT
NEUTRON TRANSPORT THEORY
NUMERICAL SOLUTION
RADIATION TRANSPORT
SPACE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TRANSPORT THEORY
700103* - Fusion Energy- Plasma Research- Kinetics