id:"swepub:oai:DiVA.org:kth-127767"
Search: id:"swepub:oai:DiVA.org:kth-127767" > Water Drop Friction...
- 1 of 1
- Previous record
- Next record
- To hitlist
Water Drop Friction on Superhydrophobic Surfaces
-
- Olin, Pontus (author)
- KTH,Fiberteknologi,Department of Fiber Technology, KTH, Stockholm, Sweden
-
- Lindström, S. B. (author)
- Linköpings universitet,Mekanik,Tekniska högskolan
-
- Pettersson, Torbjörn (author)
- KTH,Fiberteknologi,Department of Fiber Technology, KTH, Stockholm, Sweden
- show more...
- show less...
- (creator_code:org_t)
- 2013-07-10
- 2013
- English.
- In: Langmuir. - : American Chemical Society (ACS). - 0743-7463 .- 1520-5827. ; 29:29, s. 9079-9089
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- To investigate water drop friction on superhydrophobic surfaces, the motion of water drops on three different superhydrophobic surfaces has been studied by allowing drops to slide down an incline and capturing their motion using high-speed video. Two surfaces were prepared using crystallization of an alkyl ketene dimer (AKD) wax, and the third surface was the leaf of a Lotus (Nelumbo Nucifera). The acceleration of the water droplets on these superhydrophobic surfaces was measured as a function of droplet size and inclination of the surface. For small capillary numbers, we propose that the energy dissipation is dominated by intermittent pinning-depinning transitions at microscopic pinning sites along the trailing contact line of the drop, while at capillary numbers exceeding a critical value, energy dissipation is dominated by circulatory flow in the vicinity of the contacting disc between the droplet and the surface. By combining the results of the droplet acceleration with a theoretical model based on energy dissipation, we have introduced a material-specific coefficient called the superhydrophobic sliding resistance, b(sh). Once determined, this parameter is sufficient for predicting the motion of water drops on superhydrophobic surfaces of a general macroscopic topography. This theory also infers the existence of an equilibrium sliding angle, beta(eq), at which the drop acceleration is zero. This angle is decreasing with the radius of the drop and is in quantitative agreement with the measured tilt angles required for a stationary drop to start sliding down an incline.
Subject headings
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Alkyl ketene dimer
- Capillary numbers
- Circulatory flow
- Quantitative agreement
- Sliding resistance
- Super-hydrophobic surfaces
- Superhydrophobic
- Theoretical models
Publication and Content Type
- ref (subject category)
- art (subject category)
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Olin, Pontus
- Lindström, S. B.
- Pettersson, Torb ...
- Wågberg, Lars
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- and Other Physics To ...
- Articles in the publication
- Langmuir
- By the university
- Royal Institute of Technology
- Mid Sweden University
- Linköping University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
