Effects of acoustic-streaming-induced flow in evaporating nanofluid droplets

Saha, Abhishek and Basu, Saptarshi and Kumar, Ranganathan (2012) Effects of acoustic-streaming-induced flow in evaporating nanofluid droplets. In: Journal of Fluid Mechanics, 692 . pp. 207-219.

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Abstract

We study the effect of acoustic streaming on nanoparticle motion and morphological evolution inside an acoustically levitated droplet using an analytical approach coupled with experiments. Nanoparticle migration due to internal recirculation forms a density stratification, the location of which depends on initial particle concentration. The time scale of density stratification is similar to that of perikinetic-driven agglomeration of particle flocculation. The density stratification ultimately leads to force imbalance leading to a unique bowl-shaped structure. Our analysis shows the mechanism of bowl formation and how it is affected by particle size, concentration, internal recirculation and fluid viscosity.

Item Type:	Journal Article
Publication:	Journal of Fluid Mechanics
Publisher:	Cambridge University Press
Additional Information:	Copyright of this article belongs to Cambridge University Press.
Keywords:	drops;micro-/nano-fluid dynamics
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	12 Mar 2012 11:06
Last Modified:	12 Mar 2012 11:06
URI:	http://eprints.iisc.ac.in/id/eprint/43698

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