Cavitation indicates the formation of a vapor cavity within a metastable liquid. In ultrapure water this phenomenon happens in the bulk liquid phase at extreme negative pressures of the order of−120MPa. However, in practical situations, the cavitation pressure can be much closer to coexistence due to the presence of impurities which trigger heterogeneous nucleation. Classical nucleation theory is the most popular framework used to understand and analyze homogeneous cavitation; however, extending it to highly confined geometries is non-trivial. Here we developed a confined classical nucleation theory for cavitation within hydrophobic nanoporous materials – a case with important technological applications. We employ a nu- merical approach to find the most probable bubble configurations along the cavitation process. The limits of this approach are discussed by comparing the results with available molecular dynamics simulations.

Cavitation in confinement: a classical nucleation theory approach / Lisi, Emanuele; Tinti, Antonio; Giacomello, Alberto. - 1:(2017), pp. 136-146. (Intervento presentato al convegno AIMETA 2017 - XXIII Conference of the Italian Association of Theoretical and Applied Mechanics tenutosi a Salerno nel 4-7 Settembre 2017).

Cavitation in confinement: a classical nucleation theory approach

Emanuele Lisi;TINTI, ANTONIO;Alberto Giacomello
2017

Abstract

Cavitation indicates the formation of a vapor cavity within a metastable liquid. In ultrapure water this phenomenon happens in the bulk liquid phase at extreme negative pressures of the order of−120MPa. However, in practical situations, the cavitation pressure can be much closer to coexistence due to the presence of impurities which trigger heterogeneous nucleation. Classical nucleation theory is the most popular framework used to understand and analyze homogeneous cavitation; however, extending it to highly confined geometries is non-trivial. Here we developed a confined classical nucleation theory for cavitation within hydrophobic nanoporous materials – a case with important technological applications. We employ a nu- merical approach to find the most probable bubble configurations along the cavitation process. The limits of this approach are discussed by comparing the results with available molecular dynamics simulations.
2017
AIMETA 2017 - XXIII Conference of the Italian Association of Theoretical and Applied Mechanics
Cavitation, Classical Nucleation Theory, Nanopores
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Cavitation in confinement: a classical nucleation theory approach / Lisi, Emanuele; Tinti, Antonio; Giacomello, Alberto. - 1:(2017), pp. 136-146. (Intervento presentato al convegno AIMETA 2017 - XXIII Conference of the Italian Association of Theoretical and Applied Mechanics tenutosi a Salerno nel 4-7 Settembre 2017).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1025797
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