Fundamentals of Heat and Mass Transfer
Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470501979
Author: Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine
Publisher: Wiley, John & Sons, Incorporated
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Chapter 10, Problem 10.38P

A polished copper sphere of 10-mm diameter, initially at a prescribed elevated temperature T i , is quenched in a saturated (1 atm) water bath. Using the lumped capacitance method of Section 5.3.3, estimate the time for the sphere to cool (a) from T i = 130 ° C to 110 ° C and (b) from T i = 550 ° C to 220 ° C . Make use of the average sphere temperatures in evaluating properties. Plot the temperature history for each quenching process.

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Fundamentals of Heat and Mass Transfer

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