CFD Studies Coupling Hydrodynamics and Solid-Liquid Mass Transfer in Slug Flow for Matter Removal from Tube Walls

• Type: Article in International Scientific Journal
• Date: 2017

Authors

Mónica C. F. Silva (Author) Other; José D. P. Araújo (Author) FEUP; João B. L. M. Campos (Author) FEUP

Journal

Title: AICHE Journal

Vol. 63 No. 6

Pages: 2420-2439

ISSN: 0001-1541

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 3 Citations

Scopus - 5 Citations

INSPEC

Associated Projects

LEPAE/CEFT - RL2 - (Bio) Chemical Engineering: Multi-Scale Approaches for Sustainable Environment and Health

CEFT - Centro de estudos de fenómenos de transporte

Other information

Authenticus ID: P-00M-SA9

DOI: 10.1002/aic.15610

Abstract (EN): Organic matter deposition on internal surfaces constitutes a drawback that impairs the efficiency of several industrial processes. To overcome this problem, sparging a train of bubbles could be useful since its presence strongly increases the wall shear stress. A detailed numerical mass-transfer study between a finite soluble wall and the liquid around a rising Taylor bubble was performed, simultaneously solving velocity and concentration fields. The bubble passage throws solute backward and is responsible for radial dispersion. There is also an increase in the transfer rate with enhancements between 10 and 20% (depending on liquid average velocity and bubble length) compared to single-phase flow. Mass-transfer coefficients along the different hydrodynamic regions around the bubble nose, liquid film, and wake were characterized and their values compared with those from literature. The results suggest a promising potential of bubble train flow to enhance organic matter removal from walls in biological systems.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 20