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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
292 Heat Transfer: Thermal Management of Electronics
==
P
x
dP
dx
gρ
. (12.12)
This equation states that the pressure gradient along the length of a vertical plate is
the same inside and outside the boundary layer, and is equal to the pressure gradient
in the still uid outside the boundary layer.
Using Equation 12.12 and setting
Yg== =
Φ 0
in the steady-state forms of
Equations 9.13 through 9.16 in Chapter 9 results in the boundary layer equations for
steady-state natural convection ows with no heat generation:
+
=
U
x
V
y
0,
(12.13)
U
U
x
V
U
y
gU
y
+
=
+
()
,
ρρ
ρ
ν
2
2
(12.14)
U
T
x
V
T
y
T
y
+
=
α
2
2
.
(12.15)
The rst term on the right side
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Publisher Resources

ISBN: 9781439814680