Lattice Boltzmann simulations of stochastic thin film dewetting

Stefan Zitz, Andrea Scagliarini, Jens Harting*

*Corresponding author

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstract

We study numerically the effect of thermal fluctuations and of variable fluid-substrate interactions on the spontaneous dewetting of thin liquid films. To this aim, we use a recently developed lattice Boltzmann method for thin liquid film flows, equipped with a properly devised stochastic term. While it is known that thermal fluctuations yield shorter rupture times, we show that this is a general feature of hydrophilic substrates, irrespective of the contact angle θ. The ratio between deterministic and stochastic rupture times, though, decreases with θ. Finally, we discuss the case of fluctuating thin film dewetting on chemically patterned substrates and its dependence on the form of the wettability gradients,
OriginalsprogEngelsk
Artikelnummer034801
TidsskriftPhysical Review E
Vol/bind104
Udgave nummer3
Antal sider10
ISSN2470-0045
DOI
StatusUdgivet - sep. 2021
Udgivet eksterntJa

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