Artículo
Abstract:
In the present work, the freezing behaviour, for droplets colliding at terminal free fall speed with an ice substrate, is studied. The study of the crystal structure of singular frozen droplets was carried out using spectra, having 135 and 75 μm mean volume diameter. The results show that the transition temperature T*, corresponding to a value P = 0.5 of the probability of nucleation of new orientations in the droplets, decreases with the droplet diameter, varying from -18 to -29°C on a prism (112̄0) substrate, and from -11 to -13°C on a basal substrate. This behaviour is discussed on the basis of the nucleation theory. Small accretions were also grown in a cold room without ventilation, using droplets having 85 μm mean volume diameter. It is shown that, for air and substrate temperatures Ta = -7 and Ts = -3°C respectively, these accretions mostly followed the substrate orientation, although a few crystals with new orientations were formed. The difference existing between these accretions structures and those obtained in icing wind tunnels, at about the same values of Ta and Ts, is pointed out. © 1980.
Registro:
| Documento: | Artículo |
| Título: | Crystal structure of droplets frozen on an ice substrate after low speed collision |
| Autor: | Levi, L.; Nasello, O.B.; de Achával, E.M. |
| Filiación: | Instituto de Física de la Atmósfera, Servicio Meteorológico Nacional, Av. Constituyentes 3454, 1427 Buenos Aires, Argentina |
| Año: | 1980 |
| Volumen: | 48 |
| Número: | 1 |
| Página de inicio: | 121 |
| Página de fin: | 130 |
| DOI: | http://dx.doi.org/10.1016/0022-0248(80)90201-8 |
| Título revista: | Journal of Crystal Growth |
| Título revista abreviado: | J Cryst Growth |
| ISSN: | 00220248 |
| CODEN: | JCRGA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00220248_v48_n1_p121_Levi |
Referencias:
- Levi, Aufdermaur, Crystallographic Orientation and Crystal Size in Cylindrical Accretions of Ice (1970) Journal of the Atmospheric Sciences, 27, p. 443
- Levi, de Achával, Lubart, (1974) J. Crystal Growth, 22, p. 303
- Rye, Macklin, Interpretation of Crystallographic Orientations in Accreted Ice (1973) Journal of the Atmospheric Sciences, 30, p. 1421
- Macklin, Rye, Crystallographic Orientation Distributions in Accreted Ice (1974) Journal of the Atmospheric Sciences, 31, p. 849
- Levi, Prodi, Crystal Size in Ice Grown by Droplet Accretion (1978) Journal of the Atmospheric Sciences, 35, p. 2181
- Hallett, Experimental Studies of the Crystallization of Supercooled Water (1964) Journal of the Atmospheric Sciences, 21, p. 671
- Higuchi, Yosida, The Physics of Ice and Snow (1966) Intern. Conf. on Low Temperature Science, Sapporo, 1, p. 79
- Rye, Macklin, Crystal size in accreted ice (1975) Quarterly Journal of the Royal Meteorological Society, 101, p. 207
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- Bigg, (1953) Proc. Roy. Phys. Soc. (London), 66 B, p. 688
- Chalmers, (1964) Principles of Solidification, , Wiley, New York
- Ketcham, Hobbs, An experimental determination of the surface energies of ice (1969) Philosophical Magazine, 19, p. 1161
- Kuhns, Mason, The Supercooling and Freezing of Small Water Droplets Falling in Air and Other Gases (1968) Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 302 A, p. 437
- Macklin, Payne, A theoretical study of the ice accretion process (1967) Quarterly Journal of the Royal Meteorological Society, 93, p. 195
- Fletcher, (1970) The Chemical Physics of Ice, , Cambridge Univ. Press
Citas:
---------- APA ----------
Levi, L., Nasello, O.B. & de Achával, E.M. (1980) . Crystal structure of droplets frozen on an ice substrate after low speed collision. Journal of Crystal Growth, 48(1), 121-130.http://dx.doi.org/10.1016/0022-0248(80)90201-8
---------- CHICAGO ----------
Levi, L., Nasello, O.B., de Achával, E.M. "Crystal structure of droplets frozen on an ice substrate after low speed collision" . Journal of Crystal Growth 48, no. 1 (1980) : 121-130.http://dx.doi.org/10.1016/0022-0248(80)90201-8
---------- MLA ----------
Levi, L., Nasello, O.B., de Achával, E.M. "Crystal structure of droplets frozen on an ice substrate after low speed collision" . Journal of Crystal Growth, vol. 48, no. 1, 1980, pp. 121-130.http://dx.doi.org/10.1016/0022-0248(80)90201-8
---------- VANCOUVER ----------
Levi, L., Nasello, O.B., de Achával, E.M. Crystal structure of droplets frozen on an ice substrate after low speed collision. J Cryst Growth. 1980;48(1):121-130.http://dx.doi.org/10.1016/0022-0248(80)90201-8
