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

    Authors

    A. Saha; S. Basu;R. Kumar

    Comments

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    Abbreviated Journal Title

    J. Fluid Mech.

    Keywords

    drops; micro-/nano-fluid dynamics; LEVITATED DROPLETS; PLANE; Mechanics; Physics, Fluids & Plasmas

    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.

    Journal Title

    Journal of Fluid Mechanics

    Volume

    692

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    207

    Last Page

    219

    WOS Identifier

    WOS:000299883400010

    ISSN

    0022-1120

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