Numerical simulation of droplet shapes on rough surfaces

Neelesh A Patankar*, Y. Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Scopus citations

Abstract

It has been demonstrated that surface roughness causes superhydrophobicity. Our objective is to develop a numerical tool and study the relationship between the roughness characteristics and the apparent contact angle and motion of liquid drops on rough surfaces. As a first step we consider a stationary drop on a substrate with a simple geometry of horizontal grooves. A public domain software is modified to numerically investigate the 3D equilibrium drop shapes on a rough surface. We observe that a drop of given volume and actual contact angle attains different equilibrium positions on a rough substrate. The energies and the apparent contact angles of each equilibrium state are different. The actual contact angle in our simulations was ≥ 90°. It was also seen that for higher values of actual contact angles the liquid tends to move out of the grooves thus leading to the formation of a composite surface of contact on the substrate.

Original languageEnglish (US)
Title of host publication2002 International Conference on Modeling and Simulation of Microsystems - MSM 2002
EditorsM. Laudon, B. Romanowicz
Pages116-119
Number of pages4
StatePublished - Dec 1 2002
Event2002 International Conference on Modeling and Simulation of Microsystems - MSM 2002 - San Juan, Puerto Rico
Duration: Apr 21 2002Apr 25 2002

Other

Other2002 International Conference on Modeling and Simulation of Microsystems - MSM 2002
CountryPuerto Rico
CitySan Juan
Period4/21/024/25/02

Keywords

  • Contact angle
  • Drop
  • Numerical simulation
  • Roughness
  • Superhydrophobicity

ASJC Scopus subject areas

  • Engineering(all)

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    Patankar, N. A., & Chen, Y. (2002). Numerical simulation of droplet shapes on rough surfaces. In M. Laudon, & B. Romanowicz (Eds.), 2002 International Conference on Modeling and Simulation of Microsystems - MSM 2002 (pp. 116-119)