Published 4 issues per year
ISSN Print: 2169-2785
ISSN Online: 2167-857X
Indexed in
BEYOND TANNER'S LAW: ROLE OF CONTACT LINE EVAPORATION ON THE SPREADING OF VISCOUS DROPLET
ABSTRACT
The effect of relative humidity and viscosity on the spreading dynamics of water-glycerol mixtures was analyzed for a range of humidities from 20% to 80%. Droplets of identical volume were deposited on ultra-clean glass substrates. We demonstrated that, in addition to the competition between viscous forces, capillary forces, and disjoining pressure, droplet spreading was also affected by the evaporation that occurred at the triple line. We provide an updated Tanner's spreading law, which was modified to take into account the evaporative contribution. The same mechanism can be applied to adjust any fluid to Tanner's coefficient of 1/10.
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Mohammad Karim Alireza, A review of physics of moving contact line dynamics models and its applications in interfacial science, Journal of Applied Physics, 132, 8, 2022. Crossref
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Mohammad Karim Alireza, Suszynski Wieslaw J., Physics of Dynamic Contact Line: Hydrodynamics Theory versus Molecular Kinetic Theory, Fluids, 7, 10, 2022. Crossref