Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session R23: Free Surface Flows: General
1:50 PM–3:34 PM,
Monday, November 20, 2023
Room: 149AB
Chair: A Hirsa, Rensselaer Polytechnic Institute
Abstract: R23.00002 : Rogue Nanowaves Driven by Thermal Fluctuations: A New Mechanism for Thin Film Rupture*
2:03 PM–2:16 PM
Presenter:
James E Sprittles
(University of Warwick)
Authors:
James E Sprittles
(University of Warwick)
Jingbang Liu
(University of Warwick)
Duncan Lockerby
(University of Warwick)
Tobias Grafke
(University of Warwick)
In this talk, a theoretical framework will be developed for the experimentally observed thermal regime, in which fluctuation-induced nanowaves rupture linearly stable films. Molecular simulations identify these regimes and are accurately reproduced by stochastic simulations based on fluctuating hydrodynamics. It is then shown how rare-event theory can be applied to, and developed for, this field for the first time to provide exceptional computational efficiency and accuracy that allows us to extend calculations deep within thermal regime. Furthermore, analysis of the rare-event theory reveals a novel picture of how and when `rogue nanowaves’ are able to provide a route to film rupture. Finally, future applications of the new theoretical framework and experimental verification will be discussed.
*This work was supported by the EPSRC under grants EP/W031426/1, EP/S022848/1, EP/S029966/1, EP/P031684/1, EP/T011866/1, EP/V013319/1 and EP/V012002/1. Jingbang Liu is supported by a studentship within the UK EPSRC–supported Centre for Doctoral Training in the Modeling of Heterogeneous Systems (HetSys), EP/S022848/1.
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