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ISSN Online: 2688-7231

ISBN Online: 978-1-56700-524-0

Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
December, 17-20, 2021, IIT Madras, Chennai, India

Analysis of ligaments formed during sheet atomization of non-Newtonian fluids

Get access DOI: 10.1615/IHMTC-2021.4060
pages 2683-2690

Abstract

The contribution deals with the analysis of sheet atomization of Carbopol-water gels. A like-on-like impinging jet configuration is employed. The breakup of the resulting sheet into ligaments and subsequently into droplets for a range of jet velocities and gel composition in these experiments has been recently reported in Saurabh et al. citeSaurabh2020, AIAA Propulsion and Energy, 2020. Here, the focus is on the analysis of ligaments and their breakup into children droplets. The ligaments shed from the sheet are investigated visually and quantitatively via image processing. A classification of sheet disintegration into ligaments into different breakup regimes and comparison with similar classification for Newtonian fluids has been reported. The analysis of ligament disintegration into droplets is based on the estimation of the roughness and uniformity of ligament structure separating from the main sheet. Predictions based on a theoretical framework for ligament disintegration have been compared with the distribution of children droplet sizes. Also reported is the distribution of the velocity of large-sized children droplets as a function of the azimuthal angle in the plane of the sheet for different gel concentrations and jet velocities.
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