Nous proposons un modéle théorique pour expliquer la nucléation d'un cristal d'hélium par surpression acoustique. Nous explicitons les lois aux interfaces pour cette cristallisation ultra-rapide, proche des vitesses supersoniques. En supposant la symétrie sphérique et en nous appuyant sur les données expérimentales, nous retrouvons la dynamique de croissance et de fusion du cristal au cours d'une impulsion de surpression micro-onde.
We establish a theoretical model to explain the nucleation of a crystal of helium by an acoustic over-pressure. We explain the interfacial laws for this ultra-fast cristallization, close to the sound speed. Assuming spherical symmetry and taking into account the experimental data, we recover the dynamics of the growth and melting during an over-pressure impulse.
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Keywords: Acoustics, Waves, Vibrations, Interfacial laws, Crystallization, Nucleation, Solid helium, Cavitation
Martine Ben Amar 1 ; Michael P. Brenner 2 ; James R. Rice 2
@article{CRMECA_2003__331_9_601_0, author = {Martine Ben Amar and Michael P. Brenner and James R. Rice}, title = {Cristallisation par onde acoustique : le cas de l'h\'elium}, journal = {Comptes Rendus. M\'ecanique}, pages = {601--607}, publisher = {Elsevier}, volume = {331}, number = {9}, year = {2003}, doi = {10.1016/S1631-0721(03)00140-2}, language = {fr}, }
TY - JOUR AU - Martine Ben Amar AU - Michael P. Brenner AU - James R. Rice TI - Cristallisation par onde acoustique : le cas de l'hélium JO - Comptes Rendus. Mécanique PY - 2003 SP - 601 EP - 607 VL - 331 IS - 9 PB - Elsevier DO - 10.1016/S1631-0721(03)00140-2 LA - fr ID - CRMECA_2003__331_9_601_0 ER -
Martine Ben Amar; Michael P. Brenner; James R. Rice. Cristallisation par onde acoustique : le cas de l'hélium. Comptes Rendus. Mécanique, Volume 331 (2003) no. 9, pp. 601-607. doi : 10.1016/S1631-0721(03)00140-2. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/S1631-0721(03)00140-2/
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