Thermo- and soluto-capillarity: Passive and active drops

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...

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Bibliographic Details
Published inAdvances in colloid and interface science Vol. 247; pp. 52 - 80
Main Authors Ryazantsev, Yuri S., Velarde, Manuel G., Rubio, Ramón G., Guzmán, Eduardo, Ortega, Francisco, López, Pilar
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.09.2017
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Summary: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. [Display omitted] •Review of hydrodynamics of passive and active drops/bubbles in host fluids.•Mathematical description of the motion of drops/bubbles due to interfacial tension gradients is itemized.•Force on active and passive drops/bubbles has been provided.•Classical and recent experiments on active and passive motion of drops/bubbles are described.
Bibliography:ObjectType-Article-2
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ISSN:0001-8686
1873-3727
DOI:10.1016/j.cis.2017.07.025