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Sur des Gouttes, Cristaux Liquides et Front

Abstract : This thesis is divided into three parts. In the first part, the velocity of a front between an homogeneous state and a periodic state is studied with addition of the nonresonant terms to the normal form. We obtain that this velocity is zero on a finite interval around the Maxwell's point.

The second part is devoted to the study of a drop adiabatically deposited on a more dense solvent . The drop falls down to a minimum height inside the solvent, then fragmentation takes place and secondary droplets rise up to the surface. We have developed a theoretical model that captures the essential feature of the phenomenon and predicts the correct scalings for the rise-up time and the minimum height.

The third part deals with the linear study of the model
of the liquid-crystal-light-valve with optical feedback. It allows one to understand a new type of localized structures, which appears as localized peaks over a pattern of smaller amplitude.
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Contributor : René Rojas <>
Submitted on : Monday, February 5, 2007 - 5:42:17 PM
Last modification on : Monday, October 12, 2020 - 10:27:25 AM
Long-term archiving on: : Tuesday, April 6, 2010 - 8:41:00 PM


  • HAL Id : tel-00129102, version 1



René Rojas. Sur des Gouttes, Cristaux Liquides et Front. Physique [physics]. Université Nice Sophia Antipolis, 2005. Français. ⟨tel-00129102⟩



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