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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
376 Heat Transfer: Thermal Management of Electronics
−=
U
U
x
k
t
2
2
2
3
ν ,
(14.83)
−=
V
V
y
k
t
2
2
2
3
ν ,
(14.84)
−=
W
W
z
k
t
2
2
2
3
ν ,
(14.85)
−=
+
UV
U
x
V
y
t
′′ ν ,
(14.86)
−=
+
UW
U
z
W
z
t
′′ν ,
(14.87)
−=
+
VW
V
z
W
y
t
′′ν ,
(14.88)
where
kU VW=++()/′′
22 2
2
(14.89)
is the turbulent kinetic energy, and dening turbulent diffusivity, α
t
, or turbulent
Prandtl number, Pr
t
 = ν
t
/α
t
, such that
−=
=
UT
T
x
T
x
t
t
t
′′ α
ν
Pr
,
(14.90)
−=
=
VT
T
y
T
y
t
t
t
′′ α
ν
Pr
,
(14.91)
−=
=
WT
T
z
T
z
t
t
t
′′ α
ν
Pr
.
(14.92)
It is seen that the problem of determining turbulent shear stresses and turbulent
heat uxes was reduced to the problem of determining the turbulent ...
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Publisher Resources

ISBN: 9781439814680