Abstract
The experimental evaluation of a cylindrical bubble column was performed in order to provide information on the influence of the passage of bubbles on the liquid movement. The kinetic energy fields were analyzed after the energy source of the flow had been removed, in order to visualize the Kolmogorov’s energy cascade. The PIV technique was employed to acquire data on the turbulent kinetic energy of the liquid in different flow regimes (homogeneous, transition and heterogeneous). The results showed that the oscillation movement of the residual plume affects the kinetic energy dissipation during the cascade of energy from the largest to the smallest scales, which occurs faster in the heterogeneous flow regime.
References
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Chahed, J., Roig, V., Masbernat, L. Eulerian-Eulerian Two-Fluid Model for Turbulent Gas-Liquid Bubbly Flows, International Journal of Multiphase Flow, vol. 29, pp. 23-49, 2003.
Fujiwara A., Minato D., Hishida K. Effect of Bubble Diameter on Modification of Turbulence in an Upward Pipe Flow, International Journal of Heat and Fluid Flow, v. 25, p. 481-488, 2004.
Gong, C. K.; Xu, X.; Yang, Q. Gas holdup at dynamic equilibrium region of a bubble column: Effect of bubble generator performance, Chemical Engineering Journal, vol. 443, 136382, 2022.
Hoque, M. M., Sathe, M. J., Mitra, S. Joshi, J. B., Evans, G. M. Comparison of Specific energy Dissipation Rate Calculation Methodologies Utilising 2D PIV Velocity Measurement, Chemical Engineering Science, v. 137, p. 752-767, 2015.
Hosokawa, S. and A. Tomiyama, Bubble-induced Pseudo Turbulence in Laminar Pipe Flows, International Journal of Heat and Fluid Flow, vol. 40, p. 97-105, 2013.
Lance, M., Bataille, J. Turbulence in the Liquid Phase of a Uniform Bubbly Air-Water Flow, J. Fluid Mechanics, v. 222, p. 95-118, 1991.
Lelouvetel, J., Nakagawa, M., Sato, Y., Hishida, K. Effect of Bubbles on Turbulent Kinetic energy Transport in Downward Flow Measured by Time-Resolved PTV, Experimental in Fluids, v. 50, p. 813-823, 2011.
Liu, T. J. and Bankoff, S. G. Structure of Air/Water Bubbly Flow in a Vertical Pipe – I. Liquid Mean Velocity and Turbulence Measurements, International Journal of Heat and Mass Transfer, v. 36, n. 4, p. 1049-1060, 1993.
Martinez Mercado, J., Palacios-Morales, C., Zenit, R. Measurements of Pseudoturbulence Intensity in Monodispersed Bubbly Liquids for 10
Mudde, R. F., Groen, J. S., van den Akker, H. E. A. Liquid Velocity Field in a Bubble Column: LDA Experiments, Chemical Engineering Science, v. 52, p. 4217-4224, 1997.
Raffel, M., Willert, C. E., Kompenhans, J. Particle Image Velocimetry: A Practical Guide, vol. xvi, New York: Springer, 1998.
Rensen, J., Luther, S., Lohse, A. The Effect of Bubbles on Developed Turbulence, J. Fluid Mechanics, v. 538, p. 153-187, 2005.
Rzehak, R. and Krepper, E. CFD Modeling of Bubble-Induced Turbulence, International Journal of Multiphase Flow, vol. 55, p. 138-155, 2013.
Sathe, M., Joshi, J., Evans, G. Characterization of Turbulence in Rectangular Bubble Column, Chemical Engineering Science, vol. 100, p. 52-68, 2013.
Sheng, J., Meng, H., Fox, R. O. A Large Eddy PIV Method for Turbulence Dissipation Rate Estimation, Chemical Engineering Science, v. 55, p. 4423-4434, 2000.
Shi, W.; Yang, X.; Sommerfeld, M.; Yang, J.; Cai, X.; Li, G.; Zong, Y. Modelling of mass transfer for gas-liquid two-phase flow in bubble column reactor with a bubble breakage model considering bubble-induced turbulence, Chemical Engineering Journal, vol. 371, p. 470-485, 2019.
Soccol Jr., R., Piscke, A. C. G., Noriler, D., Georg, I. C., Meier, H. F. Numerical Analysis of the Interphase Forces in Bubble Columns Using Euler-Euler Modelling Framework, Canadian Journal of Chemical Engineering, v. 93, p. 2055-2069, 2015.
Taborda, M. A.; Kováts, P.; Zähringer, K.; Sommerfeld, M. The influence of liquid properties on flow structure, bubble dynamics and mass transfer in a laboratory bubble column: Experimental analysis versus numerical modelling and computation, Chemical Engineering Research and Design, vol., p. 51-72, 2022.
Tennekes, H., Lumley, J. L. A First Course in Turbulence. The MIT press, 1972.
van den Berg, T. H., Luther, S., Mazzitelli, I. M., Rensen, J. M., Toschi, F., Lohse, D. Turbulent Bubbly Flow, Journal of Turbulence, v. 7, n. 14, p. 1-12, 2006.
Vial, C., Poncin, S., Wild, G., Midoux, N. A. Simple Method for Regime Identification and Flow Characterization in Bubble Column and Airlift Reactors, Chemical Engineering and Processing, vol. 40, p. 135-151, 2001.
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