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Adv Colloid Interface Sci. 2017 Sep;247:52-80. doi: 10.1016/j.cis.2017.07.025. Epub 2017 Jul 20.

Thermo- and soluto-capillarity: Passive and active drops.

Author information

1
Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII; 1, 28040 Madrid, Spain.
2
Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII; 1, 28040 Madrid, Spain. Electronic address: mgvelarde@pluri.ucm.es.
3
Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII; 1, 28040 Madrid, Spain; Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain.
4
Instituto Pluridisciplinar, Universidad Complutense de Madrid, Paseo Juan XXIII; 1, 28040 Madrid, Spain; Departamento de Matemática Aplicada, Facultad de Biología, Universidad Complutense de Madrid, C. José Antonio Novais, 1, 28040 Madrid, Spain.

Abstract

A survey is provided of a variety of problems where a passive or an active drop experiences directed motion consequence of the action of an external or internal agent or a combination of both. An active drop is capable of reacting by engendering autonomous, self-propelled motion in favor or against the agent. The phenomena involved offer diverse complexity but one way or another the drop motion finally rests on thermo- or soluto-capillarity hence on interfacial tension gradients. Accordingly, here a minimal mathematical framework underlying such drop motions is provided when direct external temperature or solute gradients, illumination, internal heat generation or surface chemical reaction are incorporated into the physico-chemical-hydrodynamics.

KEYWORDS:

Bubbles; Drops; Laser; Marangoni effect; Soluto-capillarity; Thermo-capillarity

PMID:
28755779
DOI:
10.1016/j.cis.2017.07.025

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