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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
224 Heat Transfer: Thermal Management of Electronics
=
P
y
Y
*
*
*
, (10.21)
U
T
x
V
T
y
T
y
U
y
LL
*
*
*
*
*
*RePr
*
*
Ec
Re
*
+
=
+
1
2
2
**
*
+
2
g
, (10.22)
and the expressions for local friction coefcient and Nusselt number,
C
U
y
f
L
y
=
=
2
0
Re
*
*
*
(10.23)
and
Nu
*
*
*
L
y
T
y
=
=0
. (10.24)
These equations will be used to understand what ow variables affect friction
coefcient and convection heat transfer coefcient.
The x-momentum equation shows that the normalized x-component of uid
velocity, U*, depends on x*, y*, Re
L
, P*/x, and X*. This can be expressed by a
general functional form,
Ufxy
P
x
X
L
**,*,Re,
*
*
,*=
1
. (10.25)
Equation 10.25 shows that
=
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Publisher Resources

ISBN: 9781439814680