Three-dimensional simulation of gas-liquid in bubble columns / Simulação tridimensional com sistema gas-liquido em colunas de bolhas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

Bubble columns are equipments of simple operation, but presents a complex fluidodynamic. Its basic operation consists of the injection of a gas (disperses phase) in the bottom of the column in a liquid medium (continuous phase). As reactors, they are used in a variety of chemical processes, such as Fischer-Tropsch synthesis, oxidation reactions, alkylation reactions, effluent treatment, fermentation, reactions, protein production, and more recently, in cell cultures. In this work, three-dimensional simulations of the transient flow in bubble columns was performed using the computational package CFD CFX® 5.7 (ANSYS®). This package uses the finite volumes method to solve the governing equations of transport in multiphase flow using the Eulerian-Eulerian approach, which showed to be adequate for this study. The case studies were carried out in order to verify the influence of the properties of the continuous phase (viscosity and superficial tension), the dispersed phase (diameter of the bubbles) and the drag models ... Note: The complete abstract is available with the full electronic digital thesis or dissertations

ASSUNTO(S)

escoamento multifasico gas-liquid gases liquidos simulation methods bubble columns metodos de simulação multiphase flow gas - escoamento mathematic models metodos dos volumes finitos modelos matematicos finite volumes method

ACESSO AO ARTIGO

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