An experimental study of the anisotropic wetting behavior of a surface patterned with parallel grooves is presented. Glycerin droplet shapes, arising from grooves in the order of about 125 um, are investigated by X-ray micro computed tomography 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 orthogonal to the grooves direction are compared which each other. The effect of the sessile drop volume on the wetting behavior is discussed.

Anisotropic wetting on grooved surface observed by X-ray micro tomography

GUILIZZONI, MANFREDO GHERARDO;
2014

Abstract

An experimental study of the anisotropic wetting behavior of a surface patterned with parallel grooves is presented. Glycerin droplet shapes, arising from grooves in the order of about 125 um, are investigated by X-ray micro computed tomography 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 orthogonal to the grooves direction are compared which each other. The effect of the sessile drop volume on the wetting behavior is discussed.
Proceedings of the ILASS Europe 2014, 26th Annual Conference on Liquid Atomization and Spray Systems
978-3-00-047070-7
anisotropic wetting; contact line; multiphase interface; Xray microcomputed tomography; drop; microgrooved surfaces
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/880357
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