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Droplet impact on heated powder bed

Abstract

The impact of droplets on a heated powder bed involves a wide range of phenomena with increasing complexity, from spreading of liquid, bubble nucleation, to more complex ones such as splashing, crater formation, and fluidization. In this study, we focus on the impact behaviors caused by elevation in temperature of the powder bed. We experimentally characterize the impact behaviors for wide ranges of the impact velocity and surface temperature of the powder bed. We reveal several phenomena specific to the impact on heated powder bed such as rebound, ruptures of expanding liquid film, bubble nucleation, and fluidization. We also show that the maximum spreading diameter increases with the surface temperature of powder bed and propose an empirical scaling law to describe such relation.

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Publication details

The article was received on 11 Sep 2018, accepted on 02 Nov 2018 and first published on 07 Nov 2018


Article type: Paper
DOI: 10.1039/C8SM01858H
Citation: Soft Matter, 2018, Accepted Manuscript
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    Droplet impact on heated powder bed

    D. Liu, H. W. TAN and T. Tran, Soft Matter, 2018, Accepted Manuscript , DOI: 10.1039/C8SM01858H

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