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A novel technique for investigation of complete and partial anisotropic wetting on structured surface by X-ray microtomography
- Publication Year :
- 2015
- Publisher :
- AIP (American Institute of Physics), 2015.
-
Abstract
- An experimental study about the anisotropic wetting behavior of a surface patterned with parallel grooves is presented as an application example of a novel technique for investigation of complete and partial anisotropic wetting on structured surface by X-ray microtomography. Shape of glycerin droplets on such surface is investigated by X-ray micro computed tomography (microCT) acting as a non-intrusive, full volume 3D microscope with micrometric spatial resolution. The reconstructed drop volumes enable to estimate the exact volumes of the drops, their base contours, and 3D static contact angles, based on true cross-sections of the drop-surface couple. Droplet base contours are compared to approximate geometrical contour shapes proposed in the literature. Contact angles along slices parallel and perpendicular to the grooves direction are compared with each other. The effect of the sessile drop volume on the wetting behavior is discussed. The proposed technique, which is applicable for any structured surface, enables the direct measure of Wenzel ratio based on the microCT scan in the wetted region usually inapproachable by any others. Comparisons with simplified models are presented and congruence of results with respect to the minimum resolution needed is evaluated and commented.
- Subjects :
- Materials science
Microscope
Structured surfaces
Wenzel ratio
law.invention
Contact angle
Physics::Fluid Dynamics
Optics
Sessile drop technique
law
Anisotropic wetting
volume and surface measurements
Perpendicular
Settore ING-IND/10 - Fisica Tecnica Industriale
Anisotropy
Instrumentation
Image resolution
Tomography
X-ray micro-computed tomography (microCT)
three-phase contact line
Spatial resolution
Static contact angle
business.industry
Drop (liquid)
Wetting behavior
X-ray microCT
Drops
Application examples
X ray microtomography
Condensed Matter::Soft Condensed Matter
X-ray microCT, drop, anisotropic wetting, Wenzel ratio, drop, microfin surface, three-phase contact line, volume and surface measurements
microfin surface
drop
Wetting
business
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....e5831454b2e379c48e0291d9d52dfebb