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EPTT 2020
12th Spring School on Transition and Turbulence
NUMERICAL STUDY OF BUBBLE-INDUCED TURBULENCE MODELS IN THE DYNAMICS OF A BUBBLE COLUMN
Submission Author:
Fabia Bocayuva , SP
Co-Authors:
Fabia Bocayuva , Andre Luiz Nunis da Silva, Roberto Guardani
Presenter: Fabia Bocayuva
doi://10.26678/ABCM.EPTT2020.EPT20-0034
Abstract
A numerical model is proposed for the complex flow of a bubble column reactor. The study was carried out in a two-dimensional dynamic simulation performed in the commercial software Fluent 2019 R2. The Euler-Euler multiphase model with interaction forces source terms was employed as well as the κ-ε turbulence model. The bubble-induced turbulence (BIT) models of Simonin and Viollet (1990) and Troshko and Hassan (2001) were investigated and compared to the zero source term standard κ-ε model. The sensitivity of both BIT models in respect to their respective coefficients (Cs, Cke and Ctd) is also studied. Different bubble sizes were tested in the Eulerian multiphase model in order to optimize the numerical results. The simulations were validated with experimental data for a bubble column presented in the literature by Sheng and Iron (1993).
Keywords
Bubble Column, bubble induced turbulence, Computational fluid dynamics (CFD), Multiphase flow modeling, Numerical simulation
