Bubble breakup after interaction with a vortex-ring

0569757 - ÚCHP 2023 eng A3 - Přednáška/prezentace nepublikovaná
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]
Způsob prezentace: Přednáška
Grant CEP: GA ČR(CZ) GA22-29605S
Institucionální podpora: RVO:67985858
Klíčová slova: bubble breakup * vortex-ring * bubble deformation
Obor OECD: 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.
Trvalý link: https://hdl.handle.net/11104/0341097