Bubble breakup after interaction with a vortex-ring

0569757 - ÚCHP 2023 eng A - Abstract
Zedníková, Mária - Semlerová, Tereza - Stanovský, Petr - Trávníčková, Tereza - Orvalho, Sandra
Bubble breakup after interaction with a vortex-ring.
[European Fluid Mechanics Conference /14./. Athens, 13.09.2022-16.09.2022]
Method of presentation: Přednáška
R&D Projects: GA ČR(CZ) GA22-29605S
Institutional support: RVO:67985858
Keywords : bubble breakup * vortex-ring * bubble deformation
OECD category: Applied mechanics

Multiphase turbulent flows with vortical structures occur in many industrial applications. The knowledge and characterization of the bubble breakup mechanisms in such flows are essential to improve the modelling of multiphase systems using numerical methods. The present contribution focus on the study of mechanism of a single bubble breaking after interaction with a single vortex-ring. The experiment is based on high-speed visualization of the interaction process of a bubble rising against a descending vortex-ring. The vortex-ring is formed using a liquid stream generated at a nozzle immersed in the same liquid. The vortex size and energy are evaluated from PTV experiments and obtained results are compared with numerical simulations. From the high-speed imaging of the interaction process, the size of all bubbles, their deformations, velocities and breakup parameters (breakup time and breakup probability) are evaluated.
Permanent Link: https://hdl.handle.net/11104/0341097