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.
- Research Organization:
- California Univ., Los Angeles (USA). Dept. of Mechanical, Aerospace and Nuclear Engineering
- DOE Contract Number:
- FG03-86ER52130
- OSTI ID:
- 5841629
- Report Number(s):
- UCLA/PPG-916; ON: DE86011441
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted
- 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
PLASMA
TRANSPORT THEORY
TOKAMAK DEVICES
ATOMS
COMPUTER CALCULATIONS
DIFFUSION
FINITE ELEMENT METHOD
TWO-DIMENSIONAL CALCULATIONS
CLOSED PLASMA DEVICES
NUMERICAL SOLUTION
THERMONUCLEAR DEVICES
700105* - Fusion Energy- Plasma Research- Plasma Kinetics-Theoretical- (-1987)