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2D and 3D simulation of bubble columns using CFD methods

Irani, M ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. Publisher: 2006
  3. Abstract:
  4. This article presents the results of 2D and 3D simulations of a bubble column reactor at steady state conditions and low gas flow rates. The simulations have been done based on a two-fluid model with a k - ε model used for turbulence modeling. The experimental data have been obtained by differential pressure transducer. For analyzing of hydrodynamic parameters such as hold up and velocity profiles of phases, a system consists of water tank and air aerated from bottom is set up. The simulations have been done based on two different approaches which are mixture and eulerian approaches. Despite the fact that these approaches lead to similar results, the convergence and stability of eulerian approaches is better than mixture approach. Furthermore, the effects of gas velocity and liquid height on hydrodynamic behavior of the column are studied. Simulation results are reasonably close to the experimental data. Gas holdup has been predicted reasonably well. Results of this study show that simple two dimensional model can't be used in engineering calculations required in the design of bubble columns
  5. Keywords:
  6. Chemical reactors ; Computational fluid dynamics ; Computer simulation ; Hydrodynamics ; Parameter estimation ; Turbulence ; Water tanks ; Bubble column reactors ; Eulerian ; Hydrodynamic parameters ; Bubble columns
  7. Source: CHISA 2006 - 17th International Congress of Chemical and Process Engineering, Prague, 27 August 2006 through 31 August 2006 ; 2006 ; 8086059456 (ISBN); 9788086059457 (ISBN)