Application Catalog
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| 127 - Resistance Heating Analysis <HT,TR> |
Overview
Closeup |
The characteristics of metal that are fabricated, such as shafts, worsen
as deformation occurs. Therefore, the fabricated deformation that occurs
during thermal processing is difficult to repair, but needs to be removed
so that a standard composition is achieved.
The entire metal body needs to be heated uniformly by the thermal processing
to improve the characteristics. It is advantageous to measure the temperature
distribution when heating the metal. A thermal analysis can be performed
by using the Joule losses that are obtained with a magnetic field analysis
as the heat source in JMAG.
This example presents the use of a magnetic field and thermal analysis
to obtain the temperature distribution, temperature variations, and heat
flux distribution of the metal object heated by resistance heating. |
Temperature Distribution
Closeup |
The temperature distribution of the heated body is indicated in Fig. 1.
The center of the heated body has the highest temperature regardless of
the time. |
Temperature Variations
| The temperature variations for the measuring points A, A', B, and B' are
indicated in Fig. 2. The difference in the temperature does not vary between
at surface or center of the heated body (A-A', B-B'). Furthermore, there
is a temperature difference between the ends and center of the heated body
(A-B, A'-B') that reaches approximately 200 degrees Celsius at 700 seconds. |
Closeup |
Heat Flux Distribution
Closeup |
The heat flux distribution at 700 seconds is indicated in Fig. 3. The heat
is transferred from the heated body to the coil causing the temperature
difference in the length direction of the heated body, as indicated by
the figure.
Innovations are required to reduce the temperature difference in the length
direction to achieve more uniform heating characteristics. |
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Updated: 2011-01-17
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