Dynamic interactions between deformable drops in the Hele-Shaw geometry

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/190591

Title: Dynamic interactions between deformable drops in the Hele-Shaw geometry
Author(s): Chan, Derek Y. C.; Klaseboer, Evert; Manica, Rogerio
Abstract: A model has been developed to describe the collision and possible coalescence of two driven deformable drops in the Hele-Shaw cell. The interdependence between hydrodynamic effects and interfacial deformations is characterised by a film capillary number: Caf = (μv/σ)(Ro/ho)^3^/^2 as revealed by an analytic perturbation solution of the governing equations for a system with continuous phase viscosity μ, interfacial tension σ, drop radius Ro, characteristic relative velocity v and separation ho between the drops. Numerical solutions of the model demonstrate the importance of the full dynamic history of the interacting drops in determining stability or coalescence. The geometry of the Hele-Shaw cell allows for the possibility of using the model to infer the time-dependent force between colliding drops by measuring their separation.
Publication type: Journal article
Source: Soft Matter, Vol. 6, no. 8 (Apr 2010), pp. 1809-1815
Publication year: 2010
FOR Code(s): 0306 Physical Chemistry (Incl. Structural); 0904 Chemical Engineering
Keyword(s): Deformable drops and bubbles; Hele-Shaw cell
Publisher: The Royal Society of Chemistry
ISSN: 1744-683X
Publisher URL: http://dx.doi.org/10.1039/B918933E
Peer reviewed