Experimental And Numerical Investigation Of Gas-liquid Flow In A Rectangular Bubble Column With Centralized Aeration Flow Pattern

Bubble columns are multiphase contact devices for mass and heat transfer, which are intensively used in different industrial areas. Flow and turbulence in these equipments are induced by bubble rise motion. In this work, the fluid dynamics of gas-liquid flow in rectangular bubble columns with centralized aeration were investigated via experiments and CFD simulations. Particle Image Velocimetry (PIV) experiments were performed in a rectangular bubble column, in order to obtain additional data of the flow field (axial velocity, turbulent kinetic energy and stress tensors) of continuous phase (liquid). The experimental results show typical axial mean velocity profiles of the liquid, upward flow in the core region and a down-flow near the wall. The Large Eddy Simulation predicted well the flow behaviour in the bubble column. Copyright © 2013, AIDIC Servizi S.r.l.3215611566Albrecht, H.E., Borys, M., Damaschke, N., Tropea, C., (2002) Laser Doppler and Phase Doppler Measurement Techiques, , Springer, Berlin, GermanyBröder, D., Sommerfeld, M., An advanced lif-piv system for analysing the hidrodynamics in a laboratory bubble column at higher void fractions (2002) Experiments in Fluids, 33, pp. 826-837Bröder, D., Sommerfeld, M., Planar shadow image velocimetry for the analysis of the hidrodynamics in bubble flows (2007) Meas. Sci. Technol, 18, pp. 2513-2528Bröder, D., Sommerfeld, M., Analysis of hydrodynamics and microestructure in a bubble column by planar shadow image velocimetry (2009) Ind, Eng. Chem, 48, pp. 330-340Degaleesan, S., Dudukovic, M., Pan, Y., Experimental study of gas-induced liquid flow structures in bubble columns (2001) AIChE Journal, 47, pp. 1913-1931Dionísio, R.P., Silva, M.K., D'Ávila, M.A., Mori, M., Three-dimensional simulation of bubbly flows with different geometrical approaches (2009) International Review of Chemical Engineering, 1, pp. 467-473Ishii, M., Zuber, N., Drag coefficient and relative velocity in bubbly, droplet or particulate flows (1979) AIChE Journal, 25, pp. 843-855Mudde, R.F., Groen, J.S., Van Den Akker, H.E.A., Liquid velocity field in a bubble column: Lda experiments (1997) Chemical Engineering Science, 52, pp. 4217-4224Nogueira, S., Sousa, R.G., Pinto, A.M.F.R., Reithmuller, M.L., Campos, J.B.L.M., Simultaneous piv and pulsed shadow technique in slug flow: A solution for optical problems (2003) Experiments in Fluids, 35, pp. 598-609Silva, M.K., Mochi, V.T., Conceição, D.A., D'Ávila, M.A., Mori, M., Experimental and numerical analysis of a gas-liquid flow operating in the heterogeneous regime (2011) Chemical Engineering Transactions, 24, pp. 1447-1452. , DOI: 10.3303/CET1124242Tomiyama, A., Drag lift and virtual mass forces acting on a single bubble (2004) Third International Symposium on Two- Phase Flow Modeling and Experimentation, pp. 22-24. , Pisa, Italy, SeptemberZhou, L.X., Yang, M., Lian, C.Y., Fan, L.-S., Lee, D.J., On the second-order moment turbulence model for simulating a bubble column (2002) Chemical Engineering Science, 57, pp. 3269-328