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Article

Numerical Simulations of Polymer Solution Droplet Impact on Surfaces of Different Wettabilities †

1
Department of Mechanical, Industrial, and Aerospace Engineering, Concordia University, Montreal, QC H3G 1M8, Canada
2
AkzoNobel, Research, Development and Innovation, Gateshead NE10 0EX, UK
3
Laboratory for Geophysical and Industrial Flow(LEGI), Grenoble University, Grenoble 38000, France
*
Authors to whom correspondence should be addressed.
This paper is an extended version of a paper published at the 4th Micro and Nano Flows Conference, London, UK, 7–10 September 2014.
Processes 2019, 7(11), 798; https://doi.org/10.3390/pr7110798
Received: 30 August 2019 / Revised: 20 October 2019 / Accepted: 24 October 2019 / Published: 2 November 2019
(This article belongs to the Special Issue Computational Methods for Polymers)
This paper presents a physically based numerical model to simulate droplet impact, spreading, and eventually rebound of a viscoelastic droplet. The simulations were based on the volume of fluid (VOF) method in conjunction with a dynamic contact model accounting for the hysteresis between droplet and substrate. The non-Newtonian nature of the fluid was handled using FENE-CR constitutive equations which model a polymeric fluid based on its rheological properties. A comparative simulation was carried out between a Newtonian solvent and a viscoelastic dilute polymer solution droplet. Droplet impact analysis was performed on hydrophilic and superhydrophobic substrates, both exhibiting contact angle hysteresis. The effect of substrates’ wettability on droplet impact dynamics was determined the evolution of the spreading diameter. While the kinematic phase of droplet spreading seemed to be independent of both the substrate and fluid rheology, the recoiling phase seemed highly influenced by those operating parameters. Furthermore, our results implied a critical polymer concentration in solution, between 0.25 and 2.5% of polystyrene (PS), above which droplet rebound from a superhydrophobic substrate could be curbed. The present model could be of particular interest for optimized 2D/3D printing of complex fluids. View Full-Text
Keywords: droplet impact; viscoelasticity; volume of fluid method droplet impact; viscoelasticity; volume of fluid method
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MDPI and ACS Style

Tembely, M.; Vadillo, D.; Soucemarianadin, A.; Dolatabadi, A. Numerical Simulations of Polymer Solution Droplet Impact on Surfaces of Different Wettabilities. Processes 2019, 7, 798. https://doi.org/10.3390/pr7110798

AMA Style

Tembely M, Vadillo D, Soucemarianadin A, Dolatabadi A. Numerical Simulations of Polymer Solution Droplet Impact on Surfaces of Different Wettabilities. Processes. 2019; 7(11):798. https://doi.org/10.3390/pr7110798

Chicago/Turabian Style

Tembely, Moussa, Damien Vadillo, Arthur Soucemarianadin, and Ali Dolatabadi. 2019. "Numerical Simulations of Polymer Solution Droplet Impact on Surfaces of Different Wettabilities" Processes 7, no. 11: 798. https://doi.org/10.3390/pr7110798

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