On the effect of gravity perturbations on composition profiles during Bridgman crystal growth in space

Autor:	J.I.D. Alexander, S. Gavoille, Jean-Paul Garandet, S. Corre, J.J. Favier
Rok vydání:	1996
Předmět:	Convection business.industry Chemistry Crystal growth Mechanics Impulse (physics) Condensed Matter Physics First order Transfer function Inorganic Chemistry Optics Flow velocity Materials Chemistry business Excitation
Zdroj:	Journal of Crystal Growth. 165:471-481
ISSN:	0022-0248
DOI:	10.1016/0022-0248(96)00216-3
Popis:	We present a simple analytical model to account for the correlation between the gravity and interface concentration fluctuations during a crystal growth experiment in microgravity. The comparison of the predictions of the model with existing numerical and experimental data allows the identification a first order transfer function between the convective excitation and the composition response. The situation is far from being so clear for the hydrodynamic problem in the high frequency range, and more work is necessary to fully quantify the impact of an impulse g-jitter acceleration on the fluid velocity. In conclusion, we discuss the implications of our results on the design of future space experiments.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6910a8c354402224a83e741d75712526 https://doi.org/10.1016/0022-0248(96)00216-3 Zobrazit plný text záznamu Full Text from ScienceDirect