A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 1 potx
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 1 doc
... [5.6]
13 . Isothermal ellipsoid of semimajor
axis b and semiminor axes a
conducts heat into an infinite
medium at T
∞
; b> ;a( see 4)
4πb
1 a
2
b
2
tanh
1
1 a
2
b
2
meter [5 .16 ]
24 6
26 2 ... 5 .1 0a
Φ
1
(
Fo
1
= 0.565, Bi
1
= 0 . 21 05
)
= 0 .10
Φ
2
(
Fo
2
= 0.565, Bi
2
= 0 . 21 05
)
= 0 .10
and, with eqn. (5.7 3a) ,
Φ = Φ
1
+Φ
2
(...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 3 pot
...
=
3
20
φ−
3
28 0
φ
3
=
3
2u
∞
(6. 52)
Since φ is a constant for any Pr [recall eqn. (6.46)], we separate variables:
2
t
dδ
t
dx
=
dδ
2
t
dx
=
3 /u
∞
3
20
φ −
3
28 0
φ
3
§6.5 Heat transfer ... 0.0 021 35
so
τ
yx
= (0.0 021 35 )
1
2
ρu
2
∞
=
(0.0 021 35 )(1.05)(15)
2
2
= 0 .25 22 kg/m·s
2
and the force is
τ
yx
A = 0 .25 22( 0.5)
2
=...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 2 Part 4 ppt
... transitional
value.
Problems 335
6.31 A thin metal sheet separates air at 44
◦
C, flowing at 48 m/s,
from water at 4
◦
C, flowing at 0.2m/s. Both fluids start at a
leading edge and move in the same ... at 25
◦
C flows at 0.7m/s over a 4 cm-long flat heater
at 60
◦
C. Find h, τ
w
, h(x = 0. 04 m), and δ(x = 0. 04 m).
6 .20 A large plate is at rest in water at 15
◦
C. The plate i...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 1 potx
... R -1 2 5 1. 10
R -1 2 1. 50 R- 13 4a 1. 63
R-22 2.20 R -1 5 2a 1. 10
R -3 2 1. 20 R- 41 0a 1. 72
so that
h
fb
h
lo
= fn
(
Bo, Co
)
(9.49)
When the convection number is large (Co 1) , as for low quality,
nucleate boiling ... 30 5.6kg/m
2
s
and
Re
lo
=
GD
à
f
=
(30 5.6)(0.05)
1. 297 × 10
−4
= 1. 178 × 10
5
From eqns. (7.42) and (7. 43) :
f =
1
1. 82 log
10
(1. 178...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 2 potx
... Int. J. Heat Mass Transfer, 13: 1 425 –1 439 ,
1970.
[9. 23 ] J. S. Ded and J. H. Lienhard. The peak pool boiling heat flux from
a sphere. AIChE J., 18 (2) :33 7 34 2, 19 72.
[9 .24 ] A. L. Bromley. Heat transfer ... correlation for saturated two-phase flow
boiling heat transfer inside horizontal and vertical tubes. J. Heat
Transfer, 1 12( 1) :21 9 22 8, 1990.
§10 .3 Radi...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 3 doc
... §10.4 Heat transfer among gray bodies 5 53
Additional two-body exchange problems
Radiation shields. A radiation shield is a surface, usually of high re-
flectance, that is placed between a high-temperature ... equa-
tions above.
Figure 10.16 Illustration for
Example 10.9.
§10.4 Heat transfer among gray bodies 549
10.4 Heat transfer among gray bodies
Electrical analogy for g...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 4 potx
... The
geometrical mean beam length is defined as
L
0
≡
4 (volume of gas)
boundary area that is irradiated
(10. 54)
Thus, for two infinite parallel plates a distance apart, L
0
= 4A / 2A =
2. Some other values ... net heat transfer is calculated using the surface area of
the wall:
Q
net
g-w
= A
w
g
T
4
g
g
T
4
w
= (0 .4) (5.67 ì 10
8
)
(0.098)( 14 73)
4
(0.12)(5 73)
4...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 5 pot
... 1.42ì10
5
air-ethanol 31 3 1. 45
air-helium 276 6.24
air-napthalene 30 3 0.86
air-water 31 3 2.88
argon-helium 2 95 8 .3
628 32 .1
1068 81.0
(dilute solute, 1 )-( liquid solvent, 2) T (K) D
12
(m
2
/s)
ethanol-benzene ... D
12
(m
2
/s)
ethanol-benzene 288 2. 25 10
9
benzene-ethanol 298 1.81
water-ethanol 298 1.24
carbon dioxide-water 298 2.00
ethanol-water 288 1.00
methane-water 2...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 6 docx
... 59.72.0 16
Air 3. 711 78 .62 8. 96 H
2
O2 .65 5
a
36 3
a
18.02
Ar 3. 542 93. 339 .95 H
2
O2 .64 1
b
809.1
b
Br
2
4.2 96 507.9 159.8H
2
O
2
4.1 96 289 .33 4.01
C3 .38 5 30 .61 2.01 H
2
S3 .6 23 301. 134 .08
CCl
2
F
2
5.25 2 53 ... 28.85
Cyclohexane 0.117 33 . 03
n-Heptane 0.1 63 31 .69
n-Octane 0.185 34 .14
n-Nonane 0.207 36 . 53
n-Decane 0.229 39 .33
Acetone 0.074 28.9...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 7 doc
... possi-
bilities in turn.
Heat transfer at low rates of mass transfer
One very common case of low-rate heat and mass transfer is the evapora-
tion of water into air at low or moderate temperatures. ... mass
transfer.
Coupling can arise when temperature-dependent mass transfer pro-
cesses cause heat to be released or absorbed at a surface. For example,
during evaporation, late...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 8 pps
... tempera-
ture. We may evaluate h
∗
and g
∗
m,i
in the same way when heat and mass
transfer occur simultaneously. If composition variations are not large,
as in many low-rate problems, it may be adequate to ... when
more than one species is transferred?
§11.9 Simultaneous heat and mass transfer 667
Stagnant film model of heat transfer at high mass transfer rates
The multicomponen...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 9 pdf
... 1 29 .3 304.4 1 096
35 0 231 5 895 .2 1 09. 0 112.5 30 4.1 1078
36 0 2 290 824.881. 891 .0 30 3.8 1054
37 3 2257 717.0 30 3 .3 1022
400 21 83 346 .9 30 2.4 94 5
500 1828 299 .2 39 1
600 11 73 295 .9
700 292 .3
T
tp
2 73. 16 ... 8 ,95 4 38 4 39 8 11.57 4 83 420 401 39 1 38 9 38 4 37 8 36 6 35 2 33 6
DS-C15715
∗
8 ,90 0 38 4 36 5 ≈10.7 36 7 35 5 34 5 33 5 32 0...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 10 ppt
... Ambrazyavichyus
(1961), 32 5, 32 6, 33 9
Žukauskas and Šlanciauskas (1987),
32 5, 32 6, 33 9
Žukauskas (1972), 38 2, 38 3, 39 5
Žukauskas (1987), 38 2, 39 6
726 Appendix C: Nomenclature
E,E
0
voltage, initial voltage (V)
e, ... 10
−24
yocto y
10
21
zetta Z 10
−21
zepto z
10
18
exa E 10
−18
atto a
10
15
peta P 10
−15
femto f
10
12
tera T 10
−12
pico p
10
9
gig...
A HEAT TRANSFER TEXTBOOK - THIRD EDITION Episode 3 Part 11 pot
... 7 43
H
Hagan, G., 34 8
Hagan-Poiseuille flow, 34 8
Halocline, 674
Heat, 3
Heat capacity, see Specific heat
capacity
Heat conduction, see Conduction
Heat convection, see Convection
Heat diffusion equation
multidimensional, ... velocity, 637 , 649
Critical heat flux (CHF), see Peak heat
flux
Cross flow, 37 4 38 4
cylinders
flow field, 37 4 37 7
heat transfer, 37 7 38 0
tube bu...
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