Experiments on Bubble Breakup Induced by Collision with a Vortex Ring

• Published in: Chemical engineering & technology Vol. 42; no. 4; pp. 843 - 850
• Main Authors: Zednikova, Maria, Stanovsky, Petr, Travnickova, Tereza, Orvalho, Sandra, Holub, Ladislav, Vejrazka, Jiri
• Format: Journal Article
• Language: English
• Published: Frankfurt Wiley Subscription Services, Inc 01.04.2019
• Subjects: Breakup; Breakup frequency; Bubble breakup; Bubbles; Computational fluid dynamics; Computer simulation; Dependence; Mathematical models; Parameters; Population balance modeling; Recording; Size distribution; Turbulent flow; Vortex ring; Vortex rings; Vortices; Weber number
• ISSN: 0930-7516; 1521-4125
• DOI: 10.1002/ceat.201800607

The bubble breakup after collision with a vortex ring was validated as source of breakup parameters for population balance modeling. This system was chosen as a deterministic alternative to the stochastic nature of bubble breakup studies under turbulent flow. The vortex ring was characterized by combining experimental visualization and numerical simulations. Breakup frequency, mean number of daughter bubbles, and its size distribution were obtained by high‐speed camera recording of the collision process. The dependence of breakup parameters on the size of the mother bubble and Weber number was determined. The collision of single bubbles with single vortex rings of defined energy was studied experimentally. The intention was to investigate if the model case of a free rising bubble that interacts with a controlled liquid jet can be used as an alternative source of breakup parameters for population balance modeling of multiphase flows where bubble breakup occurs.