| Full text | |
| Author(s): |
Silva, A. C. B.
;
Esperanca, M. N.
;
Pereira, R. D.
;
Badino, A. C.
;
Bettega, R.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | Journal of the Brazilian Society of Mechanical Sciences and Engineering; v. 45, n. 10, p. 9-pg., 2023-10-01. |
| Abstract | |
Bubble column bioreactors can provide adequate heat and mass transfer, rapid mixing and good suspension of solids. The influence of the lift force in square cross-sectional bubble columns is being studied in order to evaluate its importance in CFD simulations. In this work, the global gas holdup ((alpha) over bar (G)) was analyzed experimentally and numerically using CFD. Euler-Euler model was applied for the gas-liquid multiphase simulations. Different specific air flow rates (1.0-5.0 vvm) were simulated in order to evaluate the inclusion of lift interfacial force in the modeling and the effect of air flow rate in this analysis. The simulations considering lift force effect showed greater agreement between the experimental data and those estimated by computational fluid dynamics, with the highest values of (alpha) over bar (G) found for the higher specific air flow rate (5 vvm) and the minor bubble diameter (4 mm) analyzed in this study. (AU) | |
| FAPESP's process: | 18/24460-4 - Microbubbles generation in pneumatic bioreactors: application in extractive ethanol fermentation using carbon dioxide as stripping gas |
| Grantee: | Rauber Daniel Pereira |
| Support Opportunities: | Scholarships in Brazil - Doctorate |