Spreading Dynamics of Polydimethylsiloxane Drops: Crossover from Laplace to Van der Waals Spreading

Micro-hydrodynamics of immiscible displacement inside two-dimensional porous media

“…Also, as it can be seen, after the period of time (approximately for t > 10 5 time steps) in which the macroscopic behavior given by Tanner's law is recovered, the droplet spreads faster than predicted. A similar spreading behavior has been observed experimentally for small droplets and it is attributed to an additional driving force created by van der Waals interactions (Perez et al 2001). Considering these results, it is still important to treat this subject with more details, in order to improve our understanding.…”

Interfacial interactions between hydrocarbon liquids and solid surfaces used in mechanical oil spill recovery

“…Formation of the film changes the surface properties of the solid in the vicinity of the contact line, facilitating oil spreading and reducing the measured value of the advancing contact angle. The formation of the molecular region in the closest proximity of the three-phase contact line and the effect of this precursor film on the dynamic contact angle was discussed by Karakashev et al [22], Pérez [23], and Voinov [24].…”

Wetting Characteristics of Aqueous Surfactant-Laden Drops

“…This would need to be on the order of minutes, not hours or days or even longer as is common for spreading of viscous liquids. The analysis of Perez et al (21) and de Gennes (22) indicates that the relationship between drop radius, a, and drop volume, , for a spreading drop moving with a characteristic velocity v * is given, at time t, by a ∝ m (v * t) n , [6] with n ∼ 0.1-0.15 and m ∼ 0.3-0.36. The characteristic velocity is defined by v * = γ /µ, [7] in which γ is the liquid-air surface tension and µ is the bulk liquid viscosity.…”