An experimental investigation is conducted to characterize melting and heat transfer during convective melting of an ice sphere in horizontally flowing water. The shape changes of melting ice spheres with time at different velocities and supply temperatures of water and at different initial ice temperatures are recorded using a digital video camcorder. From the recorded images, the time variations of local melting rate, local heat transfer coefficient and local Nusselt number at various angular positions are obtained. The effects of water temperature and velocity on these local parameters are analyzed and the total melting rate and average heat transfer coefficient are determined. Guided by a shape factor characterizing the particle shape variation, an empirical correlation for average Nusselt number in convective melting of a solid particle is obtained. The experimental results provide important particle-level information needed to improve the accuracy of numerical models for convective melting of a single particle or packed particles.

Issue Section:
Melting and Solidification
Keywords:
forced convection, natural convection, melting, ice, multiphase flow, Heat Transfer, Melting, Mixed Convection
Topics:
Ice, Melting, Water, Heat transfer, Heat transfer coefficients, Particulate matter, Temperature, Shapes
1.
Tkachev, A. G., 1953, “Heat Exchange in Melting and Freezing of Ice,” in Problem of Heat Transfer During Change of Phase: A Collection of Articles, AEC-tr-3405, translated from Russian, State Power Press, pp. 169–178.
2.
Merk
,
H. J.
,
1953
, “
The Influence of Melting and Anomalous Expansion on the Thermal Convection in Laminar Boundary Layers
,”
Appl. Sci. Res.
,
4
, pp.
435
–
452
.
3.
Schenk, I., and Schenkels, F. M., 1968, “Thermal Free Convection from an Ice Sphere in Water,” Appl. Sci. Res., pp. 465–476.
4.
Vanier
,
Cr. R.
, and
Tien
,
C.
,
1970
, “
Free Convection Melting of Ice Spheres
,”
AIChE J.
,
16
, pp.
76
–
82
.
5.
Eskandari, V., 1981, “Forced Convection Heat Transfer from Ice Spheres in Flowing Water,” Master’s thesis, University of Toledo, Toledo, OH.
6.
Eskandari, V., Jakubowski, G. S., and Keith, T. G., 1982, “Heat Transfer from Spherical Ice in Flowing Water,” Joint AIAA/ASME Fluids, Plasma, Thermophysics, and Heat Transfer Conference, St Louis, MO, ASME 82-HT-58, pp. 1–5.
7.
Anselmo, A., Prasad, V., and Koziol, J., 1991, “Melting of a Sphere when Dropped in a Pool of Melt with Applications to Partially-Immersed Silicon Pellets,” Heat Transfer in Metals and Containerless Processing and Manufacturing, ASME HTD Vol. 162, pp. 75–82.
8.
Anselmo
,
A.
,
Prasad
,
V.
,
Koziol
,
J.
, and
Gupta
,
K. P.
,
1993
, “
Numerical and Experimental Study of a Solid-pellet Feed Continuous Czochralski Growth Process for Silicon Single Crystals
,”
J. Cryst. Growth
,
131
, pp.
247
–
264
.
9.
Mukherjee, M. K., Shih, J., and Prasad, V., 1994, “A Visualization Study of Melting of an Ice Sphere in a Pool of Water,” 1994 International mechanical Engineering Congress and Exposition, The Winter Annual Meeting, ASME 94-WA/HT-14, Chicago, Illinois, November 6–11, 1994.
10.
Aziz, S. A., Janna, W. S., and Jakubowski, G. S., 1995, “Forced Convection Heat Transfer From an Isothermal Melting Ice Sphere Submerged in Flowing Water,” ASME HTD-Vol. 317-1, pp. 213–217.
11.
McLeod
,
P.
,
Riley
,
D. S.
, and
Sparks
,
R. S. J.
,
1996
, “
Melting of a Sphere in Hot Fluid
,”
J. Fluid Mech.
,
327
, pp.
393
–
409
.
12.
Hao, Y. L., and Tao, Y. X., 1999, “Convective Melting of a Solid Particle in a Fluid,” Proceedings of the 3rd ASME/JSME Joint Fluids Engineering Conference, San Francisco, California, July 18–23, 1999, FEDSM99-7091, pp. 1–6.
13.
Hao
,
Y. L.
, and
Tao
,
Y. X.
,
2001
, “
Melting of Solid Sphere Under Forced and Mixed Convection: Flow Characteristics
,”
ASME J. Heat Transfer
,
123
, pp.
937
–
950
.
14.
Gebhart, B., 1993, Heat Conduction and Mass Diffusion, McGraw-Hill, Inc., New York, Chap. 4.
15.
Kline
,
S. L.
, and
McClintock
,
F. A.
,
1953
, “
Describing Uncertainties in Single-Sample Experiments
,”
Mech. Eng. (Am. Soc. Mech. Eng.)
,
75
, pp.
3
–
8
.
Copyright © 2002
 by ASME
You do not currently have access to this content.