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@ARTICLE{Zitz:912059,
author = {Zitz, Stefan and Zellhöfer, Manuel and Scagliarini, Andrea
and Harting, Jens},
title = {{S}walbe.jl: {A} lattice {B}oltzmann solver for thin film
hydrodynamics},
journal = {The journal of open source software},
volume = {7},
number = {77},
issn = {2475-9066},
address = {[Erscheinungsort nicht ermittelbar]},
publisher = {Joss},
reportid = {FZJ-2022-05286},
pages = {4312 -},
year = {2022},
abstract = {Small amounts of liquid deposited on a substrate are an
everyday phenomenon. From atheoretical point of view this
represents a modelling challenge, due to the multiple
scalesinvolved: from the molecular interactions among the
three phases (solid substrate, liquidfilm and surrounding
vapor) to the hydrodynamic flows. An efficient way to deal
with thismultiscale problem is the thin-film
equation:𝜕𝑡ℎ = ∇ ⋅ (𝑀 (ℎ)∇𝑝), (1)where
ℎ is the film thickness, 𝑀 (ℎ) is a thickness
dependent mobility and 𝑝 is the pressure atthe
liquid-vapor interface. Solving the thin film equation
directly is a difficult task, because it isa fourth order
degenerate PDE (Becker et al., 2003). Swalbe.jl approaches
this problem froma different angle. Instead of directly
solving the thin film equation we use a novel method basedon
a class lattice Boltzmann models (Krüger et al., 2016),
originally developed to simulateshallow water flows (Salmon,
1999). This approach serves two benefits, on the one hand
theease of implementation where the lattice Boltzmann method
essentially comprises of two steps:collision and streaming.
On the other hand due to the simple algorithm a
straightforwardapproach to parallelize the code and run it
on accelerator devices. Choosing appropriate forcesit is
possible to simulate complex problems. Among them is the
dewetting of a patternedsubstrates as shown in Figure 1.
Beyond films, low contact angle droplets can be studied
andcompared to relaxation experiments, e.g. the Cox-Voinov
or Tanner’s law (Bonn et al., 2009).Due to a disjoining
pressure model for the three phase contact line droplets can
not only relaxtowards their equilibrium they can slide as
well (Zitz et al., 2019). All of this can be coupledwith
thermal fluctuations to study the stochastic thin film
equation (Shah et al., 2019; Zitz etal., 2021).},
cin = {IEK-11},
ddc = {004},
cid = {I:(DE-Juel1)IEK-11-20140314},
pnm = {1215 - Simulations, Theory, Optics, and Analytics (STOA)
(POF4-121) / DFG project 422916531 - Adaptive und schaltbare
Grenzflächen basierend auf strukturierten Kolloiden},
pid = {G:(DE-HGF)POF4-1215 / G:(GEPRIS)422916531},
typ = {PUB:(DE-HGF)16},
doi = {10.21105/joss.04312},
url = {https://juser.fz-juelich.de/record/912059},
}