Dissipative forces in the electrowetted Cassie-Wenzel transition on hydrophobic rough surfaces
Abstract
Dissipative forces in the electrowetting-induced Cassie-Wenzel transition on hydrophobic rough surfaces are explored. High-speed imaging of droplet shape evolution during the electrically induced spreading process allows for the location of the contact line to be tracked as a function of time. A surface energy analysis quantifies the total energy dissipated via nonconservative forces during the spreading process. Though identified as the dominant dissipative effect in droplet spreading on smooth surfaces, contact line friction is shown to have a relatively weak influence on the spreading on rough surfaces. Supplemental files are available for this article. Go to the publisher's online edition of Nanoscale and Microscale Thermophysical Engineering to view the free supplemental file.
Keywords
electrowetting; Cassie-Wenzel transition; contact-line friction; Dissipative forces; surface energy; CONTACT-ANGLE HYSTERESIS; SUPERHYDROPHOBIC SURFACES; NANOSTRUCTURED SURFACES; DEWETTING TRANSITIONS; DROPLET; DYNAMICS; ACTUATION; MODEL
DOI
10.1080/15567265.2012.683935
Citation
Journal Nanoscale and Microscale Thermophysical Engineering Volume 16, 2012 - Issue 3
Date of this Version
8-7-2012
Recommended Citation
Migliaccio, Christopher P. and Garimella, Suresh V., "Dissipative forces in the electrowetted Cassie-Wenzel transition on hydrophobic rough surfaces" (2012). Birck and NCN Publications. Paper 1293.
http://dx.doi.org/10.1080/15567265.2012.683935