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Cavitation acoustique dans l'eau et quelques liquides organiques : densité et limite de rupture

Abstract : We report on experimental study of acoustic cavitation in water and some other liquids. The 1st chapter presents first order transitions in metastable regime. The 2nd presents the classical nucleation theory and the nucleation theorem of Oxtoby which enables us to evaluate the critical volume of the bubble in our experiments. Then we report some ways to investigate cavitation. Singularities of water with respect to other liquids are presented, and we show how cavitation investigation could allow understanding them. In the 3rd we describe our acoustic device, and the static pressure method which allows to to measure cavitation pressure. The fiber optic probe hydrophone built for this thesis on the model of Eisenmenger is then thoroughly described. This apparatus allows to measure density at cavitation threshold. Results and analysis are presented, for water, in the 4th, and for D2O, Ethanol, heptanes, DMSO, the 5th chapter. From the results in water, one can see that we are far from the theory. Yet a modification by a constant factor of the surface tension allows predicting our results. Nevertheless critical volume cannot be predicted with this modification. Besides the study of the other liquids shows that our method is able to reach threshold very close to the theory, all the more so the liquid surface tension is smaller.
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Contributor : Arnaud Arvengas Connect in order to contact the contributor
Submitted on : Friday, June 22, 2012 - 11:45:29 AM
Last modification on : Thursday, March 17, 2022 - 10:08:05 AM
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  • HAL Id : tel-00710980, version 1


Arnaud Dominique Arvengas. Cavitation acoustique dans l'eau et quelques liquides organiques : densité et limite de rupture. Mécanique statistique [cond-mat.stat-mech]. Université Paris-Diderot - Paris VII, 2011. Français. ⟨NNT : ⟩. ⟨tel-00710980⟩



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