The phase distribution of upward co-current bubbly flows in a vertical square channel

• Autor(a) principal: Matos,A. de
• Data de Publicação: 2004
• Outros Autores: Rosa,E. S., Franca,F. A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of the Brazilian Society of Mechanical Sciences and Engineering (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-58782004000300007
• topic: Vertical upward bubbly flow; phase distribution in bubbly flows; bubbly flow in square channel

In this work one shows experimental data and numerical results of the void fraction distribution in vertical upward air-water bubbly flows in a square cross-section channel. To measure the void fraction distribution one used a single wire conductive probe. The averaged void fraction ranged from 3.3% to 15%; the liquid and the gas superficial velocities varied from 0.9 m/s to 3.0 m/s and 0.04 m/s to 0.5 m/s, respectively. The experimental results for the void fraction distribution were compared with numerical calculation performed by an Eulerian-Eulerian implementation of the Two-Fluid Model. In this work one performs the turbulence modeling with three approaches: using an algebraic model, the k-epsilon two-phase model and the k-epsilon two-phase two-layer model. Comparisons between the experimental and numerical data revealed, in general, good agreement.