Dynamic deformations and forces in soft matter

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/190556

Title: Dynamic deformations and forces in soft matter
Author(s): Chan, Derek Y. C.; Klaseboer, Evert; Manica, Rogerio
Abstract: The ability of soft matter such as drops and bubbles to change shape dynamically during interaction can give rise to counter-intuitive behaviour that may be expected of rigid materials. Here we show that dimple formation on approach and the possibility of coalescence on separation of proximal drops in relative motion are examples of this general dynamic behaviour of soft matter that arises from the coupling between hydrodynamic forces and geometric deformations. The film capillary number Caf ≡ (µVo/σ)(R/Ho)2 is the key parameter that determines different behavior and depends on viscosity µ, interfacial tension σ, the Laplace radius R, characteristic film thickness Ho and velocity Vo.
Publication type: Journal article
Source: Soft Matter, Vol. 5, no. 15 (Aug 2009), pp. 2858-2861
Publication year: 2009
FOR Code(s): 0306 Physical Chemistry (Incl. Structural); 0904 Chemical Engineering
Keyword(s): Deformable drops and bubbles
Publisher: The Royal Society of Chemistry
ISSN: 1744-683X
Publisher URL: http://dx.doi.org/10.1039/B907953J
Peer reviewed