Calculations of transient fields in the Felix experiments at Argonne using null field integrated techniques
Abstract
The transient eddy current problem is characteristically computationally intensive. The motivation for this research was to realize an efficient, accurate, solution technique involving small matrices via an eigenvalue approach. Such a technique is indeed realized and tested using the null field integral technique. Using smart (i.e., efficient, global) basis functions to represent unknowns in terms of a minimum number of unknowns, homogeneous eigenvectors and eigenvalues are first determined. The general excitatory response is then represented in terms of these eigenvalues/eigenvectors. Excellent results are obtained for the Argonne Felix cylinder experiments using a 4 x 4 matrix. Extension to the 3D problem (short cylinder) is set up in terms of an 8 x 8 matrix.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 August 1985
 Bibcode:
 1985STIN...8617599H
 Keywords:

 Eddy Currents;
 Eigenvalues;
 Electromagnetic Fields;
 Mathematical Models;
 Computation;
 Magnetic Fields;
 Matrices (Mathematics);
 Nuclear Fusion;
 Simulation;
 Communications and Radar