A sphere made of aluminum alloy 2024 with a diameter of 20 mm and a uniform temperature
Question:
A sphere made of aluminum alloy 2024 with a diameter of 20 mm and a uniform temperature of 500°C is suddenly immersed in a saturated water bath maintained at atmospheric pressure. The surface of the sphere has an emissivity of 0.25.
(a) Calculate the total heat transfer coefficient for the initial condition. What fraction of the total coefficient is contributed by radiation?
(b) Estimate the temperature of the sphere 30 s after it is immersed in the bath.
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KNOWN A sphere aluminum alloy 2024 with a uniform temperature of 500C and emissivity of 025 is suddenly immersed in a saturated water bath maintained at atmospheric pressure FIND a The total heat tran...View the full answer
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Related Book For 
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
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