Journal article

Contact angle effects on microdroplet deformation using CFD

G Rosengarten, DJE Harvie, J Cooper-White

APPLIED MATHEMATICAL MODELLING | ELSEVIER SCIENCE INC | Published : 2006

Abstract

In this paper we use computational fluid dynamics (CFD) to study the effect of contact angle on droplet shape as it moves through a contraction. A new non-dimensional number is proposed in order to predict situations where the deformed droplet will form a slug in the contraction and thus have the opportunity to interact with the channel wall. It is proposed that droplet flow into a contraction is a useful method to ensure that a droplet will wet a channel surface without a trapped lubrication film, and thus help ensure that a slug will remain attached to the wall downstream of the contraction. We demonstrate that when a droplet is larger than a contraction, capillary and Reynolds numbers, an..

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University of Melbourne Researchers