An improved computational technique for calculating electromagnetic forces and power absorptions generated in spherical and deformed body in levitation melting devices
Abstract
An improved computational technique for calculating the electromagnetic force field, the power absorption and the deformation of an electromagnetically levitated metal sample is described. The technique is based on the volume integral method, but represents a substantial refinement; the coordinate transformation employed allows the efficient treatment of a broad class of rotationally symmetrical bodies. Computed results are presented to represent the behavior of levitation melted metal samples in a multi-coil, multi-frequency levitation unit to be used in microgravity experiments. The theoretical predictions are compared with both analytical solutions and with the results of previous computational efforts for the spherical samples and the agreement has been very good. The treatment of problems involving deformed surfaces and actually predicting the deformed shape of the specimens breaks new ground and should be the major usefulness of the proposed method.
- Publication:
-
IEEE Transactions on Magnetics
- Pub Date:
- May 1992
- DOI:
- 10.1109/20.141293
- Bibcode:
- 1992ITM....28.1833Z
- Keywords:
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- Electromagnetic Fields;
- Electromagnetic Measurement;
- Energy Absorption;
- Levitation Melting;
- Magnetic Field Configurations;
- Spheres;
- Bodies Of Revolution;
- Computerized Simulation;
- Coordinate Transformations;
- Eddy Currents;
- Electronics and Electrical Engineering