Modeling of the dynamics of interaction of an incident droplet with a biphilic surface
M.M. Vasilev1,2, V.V. Terekhov1
1Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: dynamics of droplet interaction, biphilic surfaces, lattice Boltzmann method
Abstract
The dynamics of droplet interaction with a biphilic surface based on the lattice Boltzmann method with multiple relaxation times (MRT-LBM) is numerically simulated. The biphilic surface is a superhydrophilic circle located on a superhydrophobic plane. The paper describes various aspects of droplet spreading after its impact onto the superhydrophilic spot surface, rebound, and formation of a residual droplet for several sizes of the superhydrophilic region. Three typical regimes of droplet interaction with the biphilic surface are identified: droplet separation from the surface, transitional regime, and adhesion. Moreover, the velocity fields inside the droplet during the entire process of interaction are analyzed.
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