Simulation and experimentation of droplets on micro-patterned surfaces

Liu, Banglin

Permalink

https://hdl.handle.net/2142/72821 Copy

Description

Title

Simulation and experimentation of droplets on micro-patterned surfaces

Author(s)

Liu, Banglin

Issue Date

2015-01-21

Director of Research (if dissertation) or Advisor (if thesis)

• Hsia, K. Jimmy
• Hilgenfeldt, Sascha

Department of Study

Mechanical Sci & Engineering

Discipline

Mechanical Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Keyword(s)

• Wetting
• Droplets
• Patterned-Surfaces
• 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.

Graduation Semester

2014-12

Permalink

http://hdl.handle.net/2142/72821

Copyright and License Information

Copyright 2014 Banglin Liu

Owning Collections