Abstract
The generation and formation characteristics of air bubbles have significant impact on the performance of the membrane bioreactor system. Experiments were conducted in a tank filled with Glycerine-Water solutions so as to investigate the impacts of liquid viscosity on the bubble formation characteristics. Nozzle size ranging from 2 to 10 mm, air inlet flow rate ranging from 300 to 1500 cc/min and liquid viscosity ranging from 6 to 850 cP have been investigated. Methods to compute the non-linear characteristics such as bubble diameter and bubble rising velocity have been identified. The nonlinear behaviour of the air bubbles were further correlated to the dimensionless numbers such as Reynolds number, Eötvös number and Galilei number. A bubble shape regime was constructed so as to classify the distinct regions of the air bubbles generated from different viscous solutions. Coalescence of bubbles were studied extensively and the impact of liquid viscosity on the bubble flow regimes were presented.
| Original language | English |
|---|---|
| Article number | 105000 |
| Journal | International Communications in Heat and Mass Transfer |
| Volume | 120 |
| DOIs | |
| Publication status | Published - Jan 2021 |
Keywords
- Bubble formation
- Bubble shape
- Dimensionless numbers
- Shape regime
- Two-phase flow
- Viscosity
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- General Chemical Engineering
- Condensed Matter Physics