76th Annual Meeting of the APS Division of Fluid Dynamics (November 19, 2023 — November 21, 2023)

V0021: Liquid Jet Breakup in Coaxial Flow

Authors

• Zafar Alam, Department of Aerospace Engineering, Indian Institute of Technology Kanpur, 208016, Kanpur, India
• Bharat Bhatia, Department of Aerospace Engineering, Indian Institute of Technology Kanpur, 208016, Kanpur, India
• Ashoke De, Department of Aerospace Engineering, Indian Institute of Technology Kanpur, 208016, Kanpur, India. Department of Sustainable Energy Engineering, Indian Institute of Technology Kanpur, 208016, Kanpur, India

DOI: https://doi.org/10.1103/APS.DFD.2023.GFM.V0021

The Volume of Fluid (VOF)-Lagrangian Particle Tracking (LPT) coupled algorithm is used in this work to numerically model the breakup of a liquid jet in coaxial flow. Ligament formation arises within the liquid jet's core due to its interaction with the co-flowing air. These ligaments subsequently undergo fragmentation, yielding a spectrum of droplet sizes. This intricate process is further modeled using a Lagrangian stochastic spray model, providing insight into the secondary breakup dynamics. Moreover, our study delves into analyzing the instability within the liquid jet. This examination contributes to a comprehensive understanding of the multifaceted behavior exhibited by the liquid spray and its eventual transformation into an array of droplets of varying sizes.