Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session L12: Drops: Jetting and Break-up
4:05 PM–6:41 PM,
Monday, November 19, 2018
Georgia World Congress Center
Room: B217
Chair: Yue Ling, Baylor University
Abstract ID: BAPS.2018.DFD.L12.10
Abstract: L12.00010 : Unexpected Dynamics of Dumbbell-Shaped Filaments
6:02 PM–6:15 PM
Presenter:
Hansol Wee
(Purdue University)
Authors:
Hansol Wee
(Purdue University)
Brayden W Wagoner
(Purdue University)
Krishnaraj Sambath
(Chevron Corporation)
Christopher R Anthony
(Purdue University)
Osman A Basaran
(Purdue University)
Numerous approaches exist for producing drops which are useful in applications as diverse as printing, coating, and spraying. One approach relies on low-speed drop formation, which is common to DOD ink jet printing and dripping. Another approach exploits the instability of jets. Yet a third approach relies on creation of liquid sheets which subsequently disintegrate into ligaments. In all of these approaches, the occurrence and the subsequent breakup of long, slender filaments into drops are commonplace. In this talk, the recoil dynamics of initially quiescent, dumbbell-shaped liquid filaments surrounded by air are analyzed by 1D numerical simulation using the slender-jet approximation. Special attention is paid to the stability of the dumbbell shaped filaments in terms of the governing dimensionless groups, e.g. initial aspect ratio, dumbbell size and asymmetry, and Ohnesorge number. The results obtained with the 1D code are confirmed by direct comparison against predictions made with a 3D but axisymmetric free surface solver. The fate of recoiling dumbbell-shaped filaments is summarized by a phase diagram.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.L12.10
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