Bubble formation and swarm dynamics: Effect of increased viscosity

0584833 - ÚCHP 2025 RIV GB eng J - Journal Article
Crha, Jakub - Orvalho, Sandra - Růžička, Marek - Shirokov, V. - Jerhotová, K. - Pokorný, P. - Basařová, P.
Bubble formation and swarm dynamics: Effect of increased viscosity.
Chemical Engineering Science. Roč. 288, APR 15 (2024), č. článku 119831. ISSN 0009-2509. E-ISSN 1873-4405
R&D Projects: GA ČR(CZ) GA19-09518S
Institutional support: RVO:67985858
Keywords : bubble motion dynamics * bubbles in swarms * bubble formation * bubble column * viscosity effect
OECD category: Chemical process engineering
Impact factor: 4.7, year: 2022
Method of publishing: Open access with time embargo

Aiming to make the bridge between the studies of bubble behaviour as single bubble and in bubble columns, the characteristics of bubbles in an aerated column with a low gas content were investigated: bubbles formed at one single 0.5 mm orifice in a partially sparged small lab-scale bubble column were visualized by highspeed camera. The formation process and bubble behaviour at heights of 20 and 40 cm above the orifice were investigated. The bubble size, deformation and velocity were investigated in aqueous glycerol solutions (1 to 10 mPa.s). Average characteristics of the bubbles in swarms were obtained by statistical data processing. It was found that, the bubble formation mechanism governs the size and velocity of bubbles in swarms and that, in the investigated range, viscosity has little effect on the bubble behaviour. Individual bubbles in the swarm differ significantly in their size, shape, and velocity without correlation between these quantities.
Permanent Link: https://hdl.handle.net/11104/0352652