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Title:Simulation and experimentation of droplets on micro-patterned surfaces
Author(s):Liu, Banglin
Advisor(s):Hsia, K. Jimmy; Hilgenfeldt, Sascha
Department / Program:Mechanical Sci & Engineering
Discipline:Mechanical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Surface Evolver
Force Measurements
Abstract:We developed a robust simulation tool that provided energetic and geometric information of droplets deposited on patterned surfaces. Deformation of the droplet in response to discrete features in the contact plane was examined and quantified on an energy basis. Additionally, quasi-static simulation of relative movement between droplet and substrate was performed. Energy-displacement response of the droplet was found to exhibit surface tension-dominated elastic behavior. Experimental effort was carried out in combination with simulations. Using a novel technique, synchronized video and force response were obtained for droplets moving on patterned PDMS substrate. Features present in the force-displacement data were analyzed and linked to various aspects of the droplet-substrate system, including surface modes of the pinned droplet, residual liquids deposited behind the trailing edge, and geometric parameters of the substrate pattern.
Issue Date:2015-01-21
Rights Information:Copyright 2014 Banglin Liu
Date Available in IDEALS:2015-01-21
Date Deposited:2014-12

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