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An improved computational technique for calculating electromagnetic forces and power absorptions generated in spherical and deformed body in levitation melting devicesAn 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.
Document ID
19920063408
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Zong, Jin-Ho
(NASA Headquarters Washington, DC United States)
Szekely, Julian
(NASA Headquarters Washington, DC United States)
Schwartz, Elliot
(MIT Cambridge, MA, United States)
Date Acquired
August 15, 2013
Publication Date
May 1, 1992
Publication Information
Publication: IEEE Transactions on Magnetics
Volume: 28
Issue: 3, Ma
ISSN: 0018-9464
Subject Category
Electronics And Electrical Engineering
Accession Number
92A46032
Distribution Limits
Public
Copyright
Other

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