The effect of inclination angle of the downward facing flat plate on the interfacial wavy motion is investigated utilizing the water quenching test apparatus downward ebullient laminar transition apparatus flat surface (DELTA-FS) in a quasi-steady state. Film boiling heat transfer coefficients are obtained on the relatively long surface in the flow direction. Interfacial velocities at the various inclination angles and wall superheat conditions are determined through the analysis of the visualized continuous snapshots with 1000 fps. Visualization of the vapor film reveals that the interfacial wavelength increases and the interfacial velocity decreases as the flat plate moves from the vertical to downward facing locations. A new semi-empirical correlation is developed from the measured heat transfer coefficients and interfacial velocities. The correlation shows good agreement with the previous water test results on vertical plates. In the case of the previous other fluid experimental results on the vertical plates, the correlation overpredicts the film boiling heat transfer coefficients at the experimental condition.

References

References
1.
Bromely
,
L. A.
,
1950
, “
Heat Transfer in Stable Film Boiling
,”
Chem. Eng. Prog.
,
46
(
5
), pp.
221
227
.
2.
Koh
,
J. C.
,
1962
, “
Analysis of Film Boiling on Vertical Surfaces
,”
ASME J. Heat Transfer
,
84
(
1
), pp.
55
62
.10.1115/1.3684293
3.
Hsu
,
Y. Y.
, and
Westwater
,
J. W.
,
1960
, “
Approximate Theory for Film Boiling on Vertical Surfaces
,”
Chem. Eng. Prog. Symp. Ser.
,
56
(
30
), pp.
15
24
.
4.
Suryanarayana
,
N. V.
, and
Merte
,
H.
, Jr.
,
1972
, “
Film Boiling on Vertical Surfaces
,”
ASME J. Heat Transfer
,
94
, pp.
371
384
.10.1115/1.3449955
5.
Coury
,
G. E.
, and
Dukler
,
A. E.
,
1970
, “
Turbulent Film Boiling on Vertical Surfaces: A Study Including the Influence of Interfacial Waves
,”
Proceedings of the International Heat Transfer Conference
,
Paris, France
, Paper No. B.3.6.
6.
Frederking
,
T. H.
, and
Clark
,
J. A.
,
1963
, “
Natural Convection Film Boiling on a Sphere
,”
Adv. Cryog. Eng.
,
8
, pp.
501
506
.
7.
Dhir
,
V. K.
, and
Purohit
,
G. P.
,
1978
, “
Subcooled Film Boiling Heat Transfer From Spheres
,”
Nucl. Eng. Des.
,
47
, pp.
49
66
.10.1016/0029-5493(78)90004-3
8.
Breen
,
B. P.
, and
Westwater
,
J. W.
,
1962
, “
Effect of Diameter of Horizontal Tubes on Film Boiling Heat Transfer
,”
Chem. Eng. Prog.
,
58
(
7
), pp.
67
72
.
9.
Nishio
,
S.
, and
Ohtake
,
H.
,
1993
, “
Vapor-Film-Unit Model and Heat Transfer Correlation for Natural-Convection Film Boiling With Wave Motion Under Subcooled Conditions
,”
Int. J. Heat Mass Transfer
,
36
, pp.
2541
2552
.10.1016/S0017-9310(05)80192-9
10.
Kolev
,
N. I.
,
1998
, “
Film Boiling on Vertical Plates and Spheres
,”
Exp. Therm. Fluid Sci.
,
18
, pp.
97
115
.10.1016/S0894-1777(98)10021-3
11.
Kim
,
C. S.
,
Suh
,
K. Y.
,
Lee
,
U. C.
,
Park
,
G. C.
, and
Yoon
,
H. J.
,
2003
, “
Film Boiling Heat Transfer From Relatively Large Diameter Downward-Facing Hemispheres
,”
J. Korean Nucl. Soc.
,
35
(
4
), pp.
274
285
.
12.
Kim
,
C. S.
,
Suh
,
K. Y.
,
Rempe
,
J. L.
,
Cheung
,
F. B.
, and
Kim
,
S. B.
,
2005
, “
Effect of Interfacial Wavy Motion on Film Boiling Heat Transfer From Isothermal Downward-Facing Hemispheres
,”
Nucl. Eng. Des.
,
230
(
1–3
), pp.
311
325
.
13.
Yu
,
M. J.
,
Kim
,
C. S.
, and
Suh
,
K. Y.
,
2007
, “
Azimuthal Film Boiling Heat Transfer From a Downward-Heated Hemisphere
,”
Nucl. Tech.
,
157
(
3
), pp.
261
276
.
14.
Nishio
,
S.
,
Chandratilleke
,
G. R.
, and
Ozu
,
T.
,
1991
, “
Natural-Convection Film-Boiling Heat Transfer (Saturated Film Boiling With Long Vapor Film)
,”
JSME Int. J., Ser. II
,
34
(
2
), pp.
202
211
.
15.
Bui
,
T. D.
, and
Dhir
,
V. K.
,
1985
, “
Film Boiling Heat Transfer on an Isothermal Vertical Surface
,”
ASME J. Heat Transfer
,
107
, pp.
764
771
.10.1115/1.3247502
16.
Peyayapanakul
,
Y.
, and
Westwater
,
J. W.
,
1978
, “
Evaluation of the Unsteady-State Quenching Method for Determining Boiling Curves
,
Int. J. Heat Mass Transfer
,
21
, pp.
1437
1445
.10.1016/0017-9310(78)90208-9
17.
Okkonen
,
T.
,
Wennerstrom
,
H.
,
Hedberg
,
S.
,
Blomstrand
,
J.
,
Sehgal
,
B. R.
, and
Frid
,
W.
,
1996
, “
Film Boiling on a Longer Vertical Surface Under High Heat Flux and Water Subcooling Conditions
,”
Proceedings of the 31st National Heat Transfer Conference
,
Houston, TX
.
18.
Nishio
,
S.
, and
Chandratilleke
,
G. R.
,
1989
, “
Steady-State Pool Boiling Heat Transfer to Saturated Liquid Helium at Atmospheric Pressure
,”
JSME Int. J., Ser. II
,
32
(
4
), pp.
639
645
.
19.
Liaw
,
S. P.
, and
Dhir
,
V. K.
,
1986
, “
Effect of Surface Wettability on Transition Boiling Heat Transfer From a Vertical Surface
,”
Proceedings of the 8th International Heat Transfer Conference
,
San Francisco, CA
, Vol.
4
, pp.
2031
2036
.
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