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Heat Transfer
book

Heat Transfer

by Younes Shabany
December 2009
Intermediate to advanced content levelIntermediate to advanced
523 pages
18h 30m
English
CRC Press
Content preview from Heat Transfer
270 Heat Transfer: Thermal Management of Electronics
Note that as L , the average Nusselt number approaches to its fully developed
value of 7.54.
The average Nusselt number for the combined entry and fully developed laminar
ow inside a circular pipe at uniform surface temperature can be determined from [5]:
Nu
D
D
D
DL
DL
=+
+
366
0065
1004
2
.
.(/)Re Pr
.[(/)RePr]
//
.
3
(11.75)
Again, it is seen that as L , the average Nusselt number approaches to its fully
developed value of 3.66.
Example 11.1
Consider an electronic enclosure shaped as a duct with a cross section of
350 mm × 50 mm and length of 400 mm as shown in Figure 11.7. Let’s assume ...
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Publisher Resources

ISBN: 9781439814680