LAPSE:2021.0228v1
Published Article
LAPSE:2021.0228v1
The Hydrodynamics and Mixing Performance in a Moving Baffle Oscillatory Baffled Reactor through Computational Fluid Dynamics (CFD)
Hamid Mortazavi, Leila Pakzad
April 27, 2021
Oscillatory baffled reactors (OBRs) have attracted much attention from researchers and industries alike due to their proven advantages in mixing, scale-up, and cost-effectiveness over conventional stirred tank reactors (STRs). This study quantitatively investigated how different mixing indices describe the mixing performance of a moving baffle OBR using computational fluid dynamics (CFD). In addition, the hydrodynamic behavior of the reactor was studied, considering parameters such as the Q-criterion, shear strain rate, and velocity vector. A modification of the Q-criterion showed advantages over the original Q-criterion in determination of the vortices’ locations. The dynamic mesh tool was utilized to simulate the moving baffles through ANSYS/Fluent. The mixing indices studied were the velocity ratio, turbulent length scale, turbulent time scale, mixing time, and axial dispersion coefficient. We found that the oscillation amplitude had the most significant impact on these indices. In contrast, the oscillatory Reynolds number did not necessarily describe the mixing intensity of a system. Of the tested indices, the axial dispersion coefficient showed advantages over the other indices for quantifying the mixing performance of a moving baffle OBR.
Keywords
Computational Fluid Dynamics, dynamic mesh, hydrodynamics, mixing indices, OBR
Suggested Citation
Mortazavi H, Pakzad L. The Hydrodynamics and Mixing Performance in a Moving Baffle Oscillatory Baffled Reactor through Computational Fluid Dynamics (CFD). (2021). LAPSE:2021.0228v1
Author Affiliations
Mortazavi H: Department of Chemical Engineering, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
Pakzad L: Department of Chemical Engineering, Lakehead University, Thunder Bay, ON P7B 5E1, Canada
Journal Name
Processes
Volume
8
Issue
10
Article Number
E1236
Year
2020
Publication Date
2020-10-02
Published Version
ISSN
2227-9717
Version Comments
Original Submission
Other Meta
PII: pr8101236, Publication Type: Journal Article
Record Map
Published Article

LAPSE:2021.0228v1
This Record
External Link

doi:10.3390/pr8101236
Publisher Version
Download
Files
[Download 1v1.pdf] (7.6 MB)
Apr 27, 2021
Main Article
License
CC BY 4.0
Meta
Record Statistics
Record Views
341
Version History
[v1] (Original Submission)
Apr 27, 2021
 
Verified by curator on
Apr 27, 2021
This Version Number
v1
Citations
Most Recent
This Version
URL Here
https://psecommunity.org/LAPSE:2021.0228v1
 
Original Submitter
Calvin Tsay
Links to Related Works
Directly Related to This Work
Publisher Version