CFD Analysis of Phase Holdup Behaviour in a Gas-Liquid Bubble Column

Authors

  • Nur Khairunnisa Abd Halim Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
  • Siti Aslina Hussain Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia https://orcid.org/0000-0001-8475-9791
  • Mus’ab Abd. Razak Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
  • Mohd Amirul Syafiq Mohd Yunos Plant Assessment Technology, Industrial Technology Division, Malaysian Nuclear Agency, Bangi 43000 Kajang, Selangor Darul Ehsan, Malaysia https://orcid.org/0000-0002-0003-3350

DOI:

https://doi.org/10.33736/jaspe.3180.2021

Keywords:

Bubble column, CFD simulation, Gas holdup, Multiphase flow, Eulerian-Eulerian model

Abstract

Experimental works on bubble column hydrodynamic are normally carried out on a laboratory scale less than 0.3 m with holes number less than 10. In this paper, we discuss several approaches to bubble column scale-up, relying on variables of parameters. Two spargers with different hole diameters (0.5 mm and 1.25 mm) and superficial gas velocities (0.0125 m/s and 0.0501 m/s) are used to determine the distribution of gas holdup and liquid flow pattern. An Insignificant level of bed heights is investigated for the efficiency of hydrodynamic performance. Computational Fluid Dynamic (CFD) is used as the realistic representation of the actual reactor. The flow of the gas-liquid interface is implemented using the VOF model using the finite volume method by tracking the volume fraction of each of the fluids throughout the domain. It is observed that the initial bed heights, superficial gas velocity, and hole diameter of the sparger influence the overall gas holdup. Although the difference in sparger hole diameter affects overall gas holdup, the results are weak relative to other operating conditions. The simulation work is then compared with experimental data to improve the accuracy in analyzing the hydrodynamics of multiphase system, as well as validated the multidimensional models.

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Published

2021-04-30

How to Cite

Abd Halim, N. K. ., Siti Aslina Hussain, Mus’ab Abd. Razak, & Mohd Amirul Syafiq Mohd Yunos. (2021). CFD Analysis of Phase Holdup Behaviour in a Gas-Liquid Bubble Column. Journal of Applied Science &Amp; Process Engineering, 8(1), 738–749. https://doi.org/10.33736/jaspe.3180.2021