Artículo
Abstract:
In a previous wind tunnel investigation it was observed that ice crystals grown from accreted droplets are oriented so that the angle φ{symbol}, formed by their c-axis with the growth direction, has a prevailing value. In the present work, the average value of this angle φ{symbol} is studied as a function of the ambient and deposit temperatures Ta and Td for -12 ≥ Ta ≥ -27 °C and -5 ≥ Td ≥ -15 °C. It is shown that, as the temperature decreases. the angle φ{symbol} increases gradually from φ{symbol} < 10° to φ{symbol} {reversed tilde} 45°. For a supercooling ΔT = -Td ≤ 9 °C, the curve φ{symbol} = φ{symbol} (Td) coincides with Pruppacher's curve of the angle α (ΔT) formed by ice dendrites with the basal plane. ForΔT >; 9 °C, φ{symbol} = φ{symbol} (Td) differs from this curve, but it agrees with Hallett's result for ΔT = 16 °C. A previous interpretation of the accretion process is considered and the agreement with the experimental results is improved by assuming that the crystal orientation is determined by thin ice sheets formed on the substrate during initial freezing. These would develop, as dendrites, in the crystallographic direction of maximum growth rate. The increase of φ{symbol} = α up to 45° and the solidification mechanism of water at high ΔT are discussed. © 1974.
Registro:
| Documento: | Artículo |
| Título: | Structure of ice grown from droplet accretion and solidification process |
| Autor: | Levi, L.; De Achával, E.M.; Lubart, L. |
| Filiación: | División Cristalografia, Departamento Investigaciones, Comisión Nacional de Energia Atómica, Buenos Aires, Argentina Instituto de Fisica de la Atmósfera, Servicio Meteoroloógico Nacional, Buenos Aires, Argentina |
| Año: | 1974 |
| Volumen: | 22 |
| Número: | 4 |
| Página de inicio: | 303 |
| Página de fin: | 310 |
| DOI: | http://dx.doi.org/10.1016/0022-0248(74)90175-4 |
| 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_v22_n4_p303_Levi |
Referencias:
- Lindenmeyer, Orrok, Jackson, Chalmers, (1957) J. Chem. Phys., 27, p. 822
- Hallett, Experimental Studies of the Crystallization of Supercooled Water (1964) Journal of the Atmospheric Sciences, 21, p. 671
- Pruppacher, (1967) J. Glaciology, 6, p. 651
- Pruppacher, (1967) J. Chem. Phys., 47, p. 1807
- Macklin, Ryan, The Structure of Ice Grown in Bulk Supercooled Water (1965) Journal of the Atmospheric Sciences, 22, p. 452
- Macklin, Ryan, Habits of ice grown in supercooled water and aqueous solutions (1966) Philosophical Magazine, 14, p. 847
- Levi, Aufdermaur, Crystallographic Orientation and Crystal Size in Cylindrical Accretions of Ice (1970) Journal of the Atmospheric Sciences, 27, p. 443
- Macklin, Payne, A theoretical study of the ice accretion process (1965) Quarterly Journal of the Royal Meteorological Society, 93, p. 195
- Macklin, Payne, The spreading of accreted droplets (1969) Quarterly Journal of the Royal Meteorological Society, 95, p. 724
- Brownscombe, Hallett, Experimental and field studies of precipitation particles formed by the freezing of supercooled water (1967) Quarterly Journal of the Royal Meteorological Society, 93, p. 455
- Levi, (1970) J. Glaciology, 9, p. 109
- Jackson, Uhlman, Hunt, (1967) J. Crystal Growth, 1, p. 1
- Miksch, (1965) Rev. Sci. Instr., 36, p. 797
- Hillig, Turnbull, Theory of Crystal Growth in Undercooled Pure Liquids (1956) The Journal of Chemical Physics, 24, p. 914
- Michael, Brian, Sperry, Impurity Effects on the Basal Plane Solidification Kinetics of Supercooled Water (1966) Journal of Applied Physics, 37, p. 4649
- Jackson, (1958) Growth and Perfection of Crystals, , R.H. Doremus, B.W. Roberts, D. Turnbull, Wiley, New York
Citas:
---------- APA ----------
Levi, L., De Achával, E.M. & Lubart, L. (1974) . Structure of ice grown from droplet accretion and solidification process. Journal of Crystal Growth, 22(4), 303-310.http://dx.doi.org/10.1016/0022-0248(74)90175-4
---------- CHICAGO ----------
Levi, L., De Achával, E.M., Lubart, L. "Structure of ice grown from droplet accretion and solidification process" . Journal of Crystal Growth 22, no. 4 (1974) : 303-310.http://dx.doi.org/10.1016/0022-0248(74)90175-4
---------- MLA ----------
Levi, L., De Achával, E.M., Lubart, L. "Structure of ice grown from droplet accretion and solidification process" . Journal of Crystal Growth, vol. 22, no. 4, 1974, pp. 303-310.http://dx.doi.org/10.1016/0022-0248(74)90175-4
---------- VANCOUVER ----------
Levi, L., De Achával, E.M., Lubart, L. Structure of ice grown from droplet accretion and solidification process. J Cryst Growth. 1974;22(4):303-310.http://dx.doi.org/10.1016/0022-0248(74)90175-4
