21 - 10/18/2010 1 Internal Flow: Heat Transfer Correlations...

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Unformatted text preview: 10/18/2010 1 Internal Flow: Heat Transfer Correlations Chapter 8 Sections 8.4 through 8.6 My birthday is the same as which of the following? a) Eminem b) Mother Teresa c) Zac Efron d) Leonardo Dicaprio e) My twin sister If T s > T m , which of the following is true? a) In the entry length, T s – T m is greater for constant heat flux than for constant surface temperature. b) In the entry length, T s – T m is greater for constant heat flux than for constant surface temperature. c) T s – T m is about the same in the entry region for both flows, but it changes significantly in fully developed flow for the different conditions. 10/18/2010 2 Consider a cylinder nuclear fuel rod (length L; diameter D). Pressurized water flows through the annular region b/w the rod and the tube at a rate of m(dot), and the outer surface of the tube is well insulated. Heat generation occurs within the fuel rod, which results in a local surface heat flux given by: ( ) = L x q x q o s π sin " & Find the total heat transfer rate. ( ) = L x q x q o s π sin " & If the mass flow rate is suddenly doubled, the outlet temperature will _____________. Assume fully developed, laminar flow....
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This note was uploaded on 11/17/2010 for the course CHEN 3210 at Colorado.

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21 - 10/18/2010 1 Internal Flow: Heat Transfer Correlations...

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