Skip to Main content Skip to Navigation
Habilitation à diriger des recherches

From helium to water: capillarity and metastability in two exceptional liquids

Abstract : In this manuscript, we illustrate the concepts of capillarity and metastability with examples mostly involving helium or water. The study of metastable liquids can bring original information about their structure. In the case of water, we have measured how far the liquid could be brought away from equilibrium with the vapor: we have thus explored the region of negative pressures, where the liquid is put under mechanical tension at reduced density. Our results point out a new anomaly of water in this region. In helium, we have explored another kind of metastability, this time by applying pressure above freezing: the liquid becomes denser and metastable compared to the solid. This raises interesting questions about the persistence of superfluidity. First, we focus on capillarity, with a particular attention given to the liquid-solid interface of helium and the liquid-vapor interface of water. Some elements concerning adsorption in pores are also given. Then we discuss metastability from a theoretical point of view; we give a quantitative relation with capillarity, and make the connection between cavitation and some anomalies of helium and water. We also adress the quantum properties of metastable helium, and make a brief digression about nucleation in confined geometry. Finally, we summarize our experiments on cavitation in water and crystallization in helium, based on the same acoustic technique.
Complete list of metadata

https://tel.archives-ouvertes.fr/tel-00447938
Contributor : Frédéric Caupin Connect in order to contact the contributor
Submitted on : Sunday, January 17, 2010 - 10:46:56 AM
Last modification on : Wednesday, November 17, 2021 - 12:26:40 PM
Long-term archiving on: : Thursday, June 17, 2010 - 9:22:37 PM

Identifiers

  • HAL Id : tel-00447938, version 1

Citation

Frédéric Caupin. From helium to water: capillarity and metastability in two exceptional liquids. Condensed Matter [cond-mat]. Ecole Normale Supérieure de Paris - ENS Paris, 2009. ⟨tel-00447938⟩

Share

Metrics

Les métriques sont temporairement indisponibles