Abstract
In the theoretical analysis of cooling, Newton's law is commonly used, but it seems that the error is too large as temperature increases. In order to determine the deviation, we attempt to analyse by Stefan-Boltzmann's law of radiation. We can obtain the temperature distribution by an approximate method and revise the Bachmann Chart, in cases of slab, cylinder and sphere, respectively. It is recognized, from our result, that the deviation from the analysis with Newton's law becomes about 50%, when the temperature of body is over 600°C.
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