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Effect of wetting difference across junction on dynamics of drops impacting on the junction of dual-textured surfaces

Vaikuntanathan, Visakh and Sivakumar, D (2016) Effect of wetting difference across junction on dynamics of drops impacting on the junction of dual-textured surfaces. In: AICHE JOURNAL, 62 (11). pp. 4109-4118.

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Official URL: http://dx.doi.org/10.1002/aic.15297

Abstract

The effect of wetting difference across the junction of smooth and groove-textured portions of a dual-textured surface on the various stages in the dynamics of liquid drops impacting on the junction is reported. Two dual-textured surfaces with substantially different wetting difference across their junction, (e)=65 degrees and 25 degrees, made of intrinsically hydrophilic stainless steel and intrinsically hydrophobic poly-di-methyl-siloxane (PDMS) are considered. The effect of wetting difference across the junction is dominantly seen on the net drop drift velocity and subsequent bulk drop movement, . on the PDMS dual-textured surface is less than that on the stainless dual-textured surface due to the lower wetting difference across the junction of the former. The variation of with impact velocity shows a contrasting trend between the stainless steel and PDMS dual-textured surfaces due to the difference in critical impact velocity corresponding to drop impregnation on their groove-textured portions. (c) 2016 American Institute of Chemical Engineers AIChE J, 62: 4109-4118, 2016

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the WILEY-BLACKWELL, 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 03 Dec 2016 06:38
Last Modified: 03 Dec 2016 06:38
URI: http://eprints.iisc.ernet.in/id/eprint/55303

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