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CFD Simulation of hydrodynamic of a bubble column reactor operating in churn-turbulent regime and effect of gas inlet distribution on system characteristics

Azimi Yancheshme, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1515/ijcre-2014-0178
  3. Publisher: Walter de Gruyter GmbH
  4. Abstract:
  5. CFD simulation of cylindrical bubble column including air as dispersed phase and water as continuous phase operating in churn-turbulent flow regime with diameter of 0.49 m, height of 3.6 m and gas superficial velocity of 0.14 m/s have been conducted. All simulations have been carried out in a 2D axisymmetric, unsteady and Euler/Euler framework with the aid of commercial software FLUENT v. 14.5. Simulations were validated by our experimental results through residence time distribution (RTD) data. Effect of bubble size distribution at inlet on column hydrodynamic was investigated and results clearly showed that equilibrium bubble size distribution in most parts of column is independent of bubble size distribution at inlet. In addition, liquid axial velocity and gas hold-up profiles results in column center were approximately the same for cases with different inlet distribution and confirmed similarity of their hydrodynamic
  6. Keywords:
  7. Bubble column ; CFD ; Air ; Bubbles (in fluids) ; Computational fluid dynamics ; Fluid dynamics ; Hydrodynamics ; Size distribution ; Bubble column reactors ; Bubble distributions ; Bubble size distributions ; Churn-turbulent flow regime ; Commercial software ; Gas superficial velocity ; Liquid axial velocity ; System characteristics ; Residence time distribution
  8. Source: International Journal of Chemical Reactor Engineering ; Volume 14, Issue 1 , 2016 , Pages 213-224 ; 15426580 (ISSN)
  9. URL: https://www.degruyter.com/dg/viewarticle/j$002fijcre.2016.14.issue-1$002fijcre-2014-0178$002fijcre-2014-0178.xml