Volume 90, Number 6, June 2010
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||13 July 2010|
Sliding behavior of water droplet on superhydrophobic surface
Department of Engineering Mechanics, Tsinghua University - Beijing 100084, China
Accepted: 4 June 2010
We found experimentally that the advancing contact angles on micropillar-like superhydrophobic surfaces are hardly affected by the fraction of the water-solid interface area, while the receding contact angles and the sliding angles are strongly influenced by this geometrical parameter. Different from previous works, using particle image velocimetry (PIV) and particle tracking velocimetry (PTV) techniques, both rolling and slipping motions were observed for 5 μL water droplet during its sliding-down. We revealed that the rolling only occurs at the edge of the water droplet and the slip velocity is higher than the rolling velocity due to the low viscosity of water.
PACS: 68.05.-n – Liquid-liquid interfaces / 47.61.-k – Micro- and nano- scale flow phenomena / 61.20.-p – Structure of liquids
© EPLA, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.