Pre- and Post-Processing for Stream-Function Eddy Current Calculations.
Abstract
A stream function or vector potential for the current density vector has been used to develop a finite element code called EDDY2 for calculating induced currents in thin conducting plates for steady-state harmonic external fields. While two-dimensional, the code includes self-field effects for harmonic fields for skin depths on the order of the plate thickness and larger. The input to this Fortran program includes the geometry and properties of the plate, the boundary conditions, and a description of the external magnetic field; this information must all be expressed in terms of the nodes and elements of the computational mesh devised by the analyst. The program produces values of the stream function of the nodes and, at sampling points interior to each element, values of the eddy current, the temperature induced in a half cycle of the current, and the time-averaged magnetic pressure. Although this program has proven to be computationally effective, as with all finite element programs, a significant amount of effort is consumed by the preparation of error-free input data and the reduction and presentation of the analysis results. To expedite the consideration of a large number of configurations in research or design, interactive graphics techniques can be used. Two programs are explained and demonstrated through an example problem which is part of a study of power dissipation in plates as a function of plate geometry. The particular configuration chosen for this example is a rectangular plate with opposite semicurcular notches at the center of the long sides.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA150417
Entities
People
- F. C. Moon
- J. F. Abel
- T. J. Mccoy
Organizations
- Cornell University