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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
184 Heat Transfer: Thermal Management of Electronics
Radiation boundary conditions for both sides of the thin plane wall shown in
Figure 8.8 can be written as
surr,1
4
=−
[]
k
T
x
TTt
k
T
x
t(,)
(
(,),
0
1
4
0εσ
LLt
TLtT
,)
(,).=−
[]
εσ
2
4
2
4
surr,
(8.40)
Example 8.4
Let’s consider the silicon die of Example 8.2 and assume that the back side of this
die has an emissivity of 0.7 and is exposed to a surrounding at 25°C. Obtain an
expression for temperature distribution inside this die.
Solution
The differential equation and the boundary conditions are
dT
dx
k
dT
dx
x
2
2
0
0
2
=
−=
=
,
()
Boundary Conditions:
00000
0 0007
0 0007
4
W/m.
m
2
m
−=
=
k
dT
dx
T
x(. )
((.)εσ −−
298
4
).
The genera ...
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Publisher Resources

ISBN: 9781439814680