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Effect of Particle Concentration on Shape Deformation and Secondary Atomization Characteristics of a Burning Nanotitania Dispersion Droplet

Miglani, Ankur and Basu, Saptarshi (2015) Effect of Particle Concentration on Shape Deformation and Secondary Atomization Characteristics of a Burning Nanotitania Dispersion Droplet. In: JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 137 (10).

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Official URL: http://dx.doi.org/10.1115/1.4030394

Abstract

Secondary atomization characteristics of burning bicomponent (ethanol-water) droplets containing titania nanoparticles (NPs) in dilute (0.5% and 1 wt.%) and dense concentrations (5% and 7.5 wt.%) are studied experimentally at atmospheric pressure under normal gravity. It is observed that both types of nanofuel droplets undergo distinct modes of secondary breakup, which are primarily responsible for transporting particles from the droplet domain to the flame zone. For dilute nanosuspensions, disruptive response is characterized by low intensity atomization modes that cause small-scale localized flame distortion. In contrast, the disruption behavior at dense concentrations is governed by high intensity bubble ejections, which result in severe disruption of the flame envelope.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ASME, TWO PARK AVE, NEW YORK, NY 10016-5990 USA
Keywords: nanofluid fuel; nanoparticles; droplet deformation; micro-explosion; bubble ejections; secondary atomization
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Depositing User: Id for Latest eprints
Date Deposited: 24 Sep 2015 06:54
Last Modified: 24 Sep 2015 06:54
URI: http://eprints.iisc.ac.in/id/eprint/52430

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