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Accueil du site > Évènements > Séminaires > Séminaires IUSTI > Archives IUSTI > 2016

Vendredi 1 juillet 2016 / IUSTI

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Séminaire IUSTI

Building towers, domes, and arches by self-organized solidifying flows

Orateur : Julien Chopin

Abstract : The impact of a liquid on a surface leads to beautiful dynamical shapes that result from a subtle interplay between inertial effects, fluid properties and substrate characteristics. When the liquid undergoes solidification upon impact, the flow can be dramatically modified by the growth of a solid phase. In this talk, I will show that a wide variety of delicate solid structures from slender towers to arches, and chiral pagodas can be created by simply pouring a mixture of grains and water on a liquid absorbing substrate [1, 2]. By draining the interstitial liquid from the suspension, the substrate causes a rapid solidification of the fluid into a mechanically stable structure. I will discuss the origin of the morphologies observed and point out potential applications of a drainage driven jamming of granular suspensions to shape cohesive granular materials.

[1] J. Chopin and A. Kudrolli, Phys. Rev. Lett. 107, 208304 (2011)
[2] J. Chopin and A. Kudrolli, Soft Matter 11, 659 (2015)

Date et lieu  : le Vendredi 1 Juillet 2016 à 11h, salle 250, IUSTI