TY - JOUR
T1 - Lattice Boltzmann modeling of a gravity-driven sliding droplet under a dynamic wetting regime
AU - Zhumatay, Nursultan
AU - Kabdenova, Bagdagul
AU - Monaco, Ernesto
AU - Rojas-Solórzano, Luis R.
N1 - Funding Information:
This work was supported by Nazarbayev University MSc and Ph.D. studentships of Nursultan Zhumatay and Bagdagul Dauyeshova, respectively, funded by the Ministry of Education and Science of the Republic of Kazakhstan . This work is also funded within the project NU Faculty Development Competitive Research Grants 2018 , “Simulation of CO 2 flow in porous media using Lattice Boltzmann Model”, #- SOE2018016 .
Publisher Copyright:
© 2020 Elsevier Masson SAS
PY - 2021/3/1
Y1 - 2021/3/1
N2 - This work presents the numerical modeling of a sliding droplet on a vertical smooth wall under hydrophobic and hydrophilic conditions using the multiphase Shan–Chen Lattice Boltzmann Model (SC-LBM). The gravitational action above the interfacial force was introduced through the variation of the Bond number and contact angle between droplet, solid surface and surrounding fluid. A critical Bond number, above which the droplet would keep indefinitely deforming, was found for different wettability conditions as well as density and viscosity ratios. The critical Bond number proved to be insensitive to the viscosity ratio (Fluid 1/ Fluid 2, Fluid 1: liquid; Fluid 2: gas), but largely dependent on the density ratio (Fluid 1/ Fluid 2, Fluid 1: liquid; Fluid 2: gas). The present SC-LBM results demonstrate the excellent suitability of the multiphase SC-LBM for the prediction of the dynamic contact angle and reproduction of the continuous droplet deformation and eventual breakup of a sliding droplet subject to gravity force.
AB - This work presents the numerical modeling of a sliding droplet on a vertical smooth wall under hydrophobic and hydrophilic conditions using the multiphase Shan–Chen Lattice Boltzmann Model (SC-LBM). The gravitational action above the interfacial force was introduced through the variation of the Bond number and contact angle between droplet, solid surface and surrounding fluid. A critical Bond number, above which the droplet would keep indefinitely deforming, was found for different wettability conditions as well as density and viscosity ratios. The critical Bond number proved to be insensitive to the viscosity ratio (Fluid 1/ Fluid 2, Fluid 1: liquid; Fluid 2: gas), but largely dependent on the density ratio (Fluid 1/ Fluid 2, Fluid 1: liquid; Fluid 2: gas). The present SC-LBM results demonstrate the excellent suitability of the multiphase SC-LBM for the prediction of the dynamic contact angle and reproduction of the continuous droplet deformation and eventual breakup of a sliding droplet subject to gravity force.
KW - Bond number
KW - Contact angle
KW - Lattice Boltzmann
KW - Multiphase flow
KW - Shan–Chen
KW - Sliding droplet
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U2 - 10.1016/j.euromechflu.2020.12.008
DO - 10.1016/j.euromechflu.2020.12.008
M3 - Article
AN - SCOPUS:85098564891
SN - 0997-7546
VL - 86
SP - 198
EP - 209
JO - European Journal of Mechanics, B/Fluids
JF - European Journal of Mechanics, B/Fluids
ER -