Open AccessContact angle hysteresis of Newtonian fluid
Author(s) -
Zhiqing Wang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/585/1/012109
Subject(s) - contact angle , hysteresis , wetting , materials science , dewetting , surface finish , surface roughness , mechanics , condensed matter physics , composite material , physics
Contact angle hysteresis of Newtonian fluid is a fundamental and complicated phenomenon related to wetting and dewetting. This article reviews typical research progress of contact angle hysteresis and proposes some critical directions deserved to be investigated. The traditional measuring methods are not accurate to measure the contact angle, and the conventional definition is not suitable for the Wenzel, Cassie, or the intersection of the two states. The surface roughness and droplet size are important factors affecting the hysteresis. Effective roughness scale for hysteresis could be at nanoscale. The difference between microscopic and macroscopic contact angle leads to different hysteresis at microscopic scale, which is valuable for nanodevice.