Evaporation from Unsaturated Porous Media: Study on Inter-Particle Liquid Bridges
Evaporation from Unsaturated Porous Media: Study on Inter-Particle Liquid Bridges
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Our Objective
Our Objective
To understand the evaporation from porous media at unsaturated conditions through a study on the inter-particle liquid bridges
To understand the evaporation from porous media at unsaturated conditions through a study on the inter-particle liquid bridges
Work on Sessile Droplets
Work on Sessile Droplets
Goniometer used for present work
Model of an evaporating sessile droplet
Static Contact Angles of DI Water droplets on different surfaces
Chemical treatment for Surface Energy alteration
Self-assembled monolayer of silane or thiol precursors.
Silanes considered: Perfluoro Octyl Trichloro Silane (FOTS); Octadecyl Trichloro Silane (OTS); 3-Amino Propyl Trimethoxy Silane (APTMS)
Movie of evaporation of sessile droplet from different surfaces
Media1.mp4APTES-RH=48%, V= 3.27 microL, total evaporation time: 1035 secs
Media2.mp4Teflon-RH=35%, V= 5.5 microL, total evaporation time=2014 secs
Transient Drop Geometry Evolution of Sessile water drop evaporating on a Teflon tape placed on different substrates
(a) Contact Radius; (b) Contact Angle;
Work on Liquid Bridges
Schematic of Liquid Bridge between Spherical Substrates
Transient Evolution of an Evaporating Liquid Bridge between Spherical Steel Substrates at a Separation of ~0.5 mm
Images of Evaporating Liquid Bridge at different times before rupture.
Images are taken using high speed imaging at 1,00,000 frames per second in duplicate experiments.
Negative sign indicates the events prior to rupture.
0 millisec represents the time at rupture.
Separation between the surfaces is ~1.5 mm.
Movie representing the evolution of DI Water liquid bridge in the final stages of evaporation. Taken at 1,00,000 frames per seconds
LB Evaporation.mp4Page updated
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