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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
406 Heat Transfer: Thermal Management of Electronics
where ρ
b
and V
b
are density and volume of the oating object, respectively. The sec-
ond term on the left side of Equation 15.7 is the buoyancy force applied on the object.
Substituting for F
D
from Equation 15.6 and solving for U
m
gives
U
g
CA
m
b
DF
b
=−
2V ρ
ρ
1.
(15.8)
The values of C
D
is determined such that U
m
in Equation 15.6 is the average uid
velocity in the annular space between the object and the tube. If A is the annular ow
cross section area around the oating object, the ow rate is
V
V
==
AU A
g
CA
m
b
DF
b
2
1
ρ
ρ
.
(15.9)
The annular cross section area in a rotameter is usually related ...
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Publisher Resources

ISBN: 9781439814680