Hydrodynamics of airlift reactor with internal circulation loop

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Journal Title
Journal ISSN
Volume Title
Conference article in proceedings
Date
2012
Major/Subject
Mcode
Degree programme
Language
en
Pages
16
892-907
Series
20th International Congress of Chemical and Process Engineering CHISA 2012 25 – 29 August 2012, Prague, Czech Republic, Procedia Engineering, Volume 42
Abstract
Effect of geometrical parameters on two phase hydrodynamics of airlift reactor is the main topic of present paper. Laboratory scale apparatus with internal circulation loop consists of concentric draft tube, in which a gas bubbles rising. Setup of draft tube inside of reactor is important geometry parameter and has big influence on two phase hydrodynamics. In experiment was studied influence of changes diameter of draft tube to hydrodynamics in airlift reactor. Results of experiments (liquid velocity and gas hold-up) were compared with the simple CFD simulations performed in COMSOL Multiphysics 3.5a. For each point of gas volumetric flow in simulation, were determined conditions of bubble diameter and bubble drag coefficient. Although bubble break-up and coalescence were neglected, the results of numerical simulation are in pretty good agreement with experimental data.
Description
Keywords
Airlift reactor, Bubbles, CFD simulation, Draft tube
Other note
Citation
Lestinsky , P , Väyrynen , P , Vecer , M & Wichterle , K 2012 , Hydrodynamics of airlift reactor with internal circulation loop : Experiment vs. CFD simulation . in 20th International Congress of Chemical and Process Engineering CHISA 2012 25 – 29 August 2012, Prague, Czech Republic . Procedia Engineering , vol. 42 , Elsevier , pp. 892-907 , International Congress of Chemical and Process Engineering , Prague , Czech Republic , 25/08/2012 . https://doi.org/10.1016/j.proeng.2012.07.482