| Presentation: | submitted: | by: |
|---|---|---|
| etm_feb_2007_icc.pdf | 2007-03-30 13:32:03 | Eric Meier |
Developing and Benchmarking MH4D, a Tetrahedral Mesh MHD Code
Author: Eric T. Meier
Requested Type: Poster Only
Submitted: 2006-12-15 14:46:08
Co-authors: W. Lowrie, G. Marklin, U. Shumlak
Contact Info:
University of Washington
3801 Brooklyn Ave. NE
Seattle, WA 98105
USA
Abstract Text:
Periodic boundary conditions, applicable to parallel and non-parallel planes have been developed. Mode selection is achieved by modeling a "slice" of a domain. For instance, modeling a 1/4-slice of a cylindrical Z-pinch geometry eliminates the m=1,2, and 3 modes. M=4 and higher modes will still be simulated.
An insulating boundary condition has been developed. External circuits can be modeled by specifying electric and magnetic surface fields. A specified magnetic field simulates a circuit with constant current where Ampere's law dictates the current flow. A specified electric field simulates a constant applied voltage. A constant current model is applicable to experiments with relatively high-impedance power supplies.
To function with the insulating boundary condition, implicit and semi-implicit solvers require inclusion of surface terms. These solvers are being modified. Also, ionization physics capability is being developed.
Progress in boundary condition development is presented, and a benchmarking and verification strategy is described.
Characterization: E10
Comments:
