Water enters a circular tube whose walls are maintained at constant temperature at a specified flow rate
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Water enters a circular tube whose walls are maintained at constant temperature at a specified flow rate and temperature. For fully developed turbulent flow, the Nusselt number can be determined from Nu = 0.023 Re0.8 Pr0.4. The correct temperature difference to use in Newton s law of cooling in this case is
(a) The difference between the inlet and outlet water bulk temperature.
(b) The difference between the inlet water bulk temperature and the tube wall temperature.
(c) The log mean temperature difference.
(d) The difference between the average water bulk temperature and the tube temperature.
(e) None of the above.
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In the context of Newtons law of cooling and heat transfer the correct temperature difference to use depends on the specific situation and the heat tr...View the full answer
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Related Book For 
Heat And Mass Transfer Fundamentals And Applications
ISBN: 9780073398181
5th Edition
Authors: Yunus Cengel, Afshin Ghajar
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