The shape evolution of bubble formed in carboxymethylcellulose (CMC) aqueous solution was real-time observed using laser image technique. The flow fields of liquid around growing and rising bubble were measured by laser Doppler velocimetry (LDV), and the liquid mean velocity and its contour curves were obtained. The results show that bubble grows as spherical shape because of the dominant role of surface tension in the early period, and then is stretched gradually as a teardrop shape due to the common effect of buoyancy and shear-thinning of fluid. The axial mean velocity of liquid phase takes on Gaussian distribution with the symmetrical axis passing through orifice center. However, the radial mean velocity increases first and then decreases with the increase of the distance from measured point to the symmetrical axis above. Further, the axial component along symmetrical axis decreases initially and increases with the rise of height, as well as its corresponding contour map diverging gradually. The radial component, yet, decreases steadily with the rise of height, and the maximum value deviates towards the two sides until disappear, as it contour shape of butterfly’s “front wing”.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Price excludes VAT (USA)
Tax calculation will be finalised during checkout.
Shah, Y.T., Kelkar, B.G., Godbole, S.P., Deckwer, W.D., Design parameters estimation for bubble column reactors, AIChE J., vol. 28, 1982, pp. 353–379.
Kilonzo, P.M., Margaritis, A., The effects of non-Newtonian fermentation broth viscosity and small bubble segregation on oxygen mass transfer in gas-lift bioreactors: A critical review, Biochem. Eng. J. vol. 17, 2004, pp. 27–40.
Hassagar, O., Negative wake behind bubbles in non-Newtonian liquids, Nature, vol. 279, 1979, pp. 402–403.
Bisgaard, C., Hassager, O., An experimental investigation of velocity fields around spheres and bubbles moving in non-Newtonian liquid, Rheol. Acta, vol. 21, 1982, pp. 537–548.
Arigo, M.T., McKinley, G.H., An experimental investigation of negative wakes behind spheres settling in a shear-thinning viscoelastic fluid, Rheol. Acta, vol. 37, 1998, pp. 307–327.
Frank, X., Li, H.Z., Complex flow around a bubble rising in a non-Newtonian fluid, Phys. Rev. E. vol. 71, 2005, pp. 036309.
Frank, X., Li, H.Z., Negative wake behind a sphere rising in viscoelastic fluids: A lattice Boltzmann investigation, Phys. Rev. E. vol. 74, 2006, pp. 056307.
Sousa, R.G., Pinto, A.M.F.R., Campos, J.B.L.M., Interaction between Taylor bubbles rising in stagnant non-Newtonian fluids, Int. J. Multiphase Flow, vol. 33(9) (2007) 970–986.
Lin, T.J., Lin, G.M., Mechanisms of in-line coalescence of two-unequal bubbles in a non-Newtonian fluid, Chem. Eng. J. vol. 155, 2009, pp. 750–756.
Fan, W.Y., Ma, Y.G., Li, X.L., Li, H.Z., Study on the flow field around two parallel moving bubbles and interaction between bubbles rising in CMC solutions by PIV, Chin. J. Chem. Eng. Vol. 17, 2009, pp. 904–913.
Ghosh, A.K., Ulbrecht, J.J. Bubble formation from a sparger in polymer solutions, Chem. Eng. Sci., vol. 44, 1989, pp. 957–968.
Terasaka, K., Tsuge, H., Bubble formation at a single orifice in non-Newtonian liquids, Chem. Eng. Sci., vol. 46, 1991, pp. 85–93.
Li, H.Z., Mouline, Y., Midoux, N., Modelling the bubble formation dynamics in non-Newtonian fluids, Chem. Eng. Sci., vol. 57, 2002, pp. 339–346.
Fan, W.Y., Ma, Y.G., Jiang, S.K., Li, H.Z., An experimental investigation for bubble rising in non-Newtonian fluids and empirical correlation of drag coefficient, J Fluid Eng-T ASME, vol. 132, 2010, pp. 021305.
Zhang, L., Yang, C., Mao, Z.S., Numerical simulation of a bubble rising in shear-thinning fluids, J. Non-Newtonian Fluid Mech., vol. 165, 2010, pp. 555–567.
Lin, T.J., Lin, G.M., An experimental study on flow structures of a single bubble rising in a shear-thinning viscoelastic fluid with a new measurement technique, Int. J. Multiphase Flow, vol. 31, 2005, pp. 239–252.
Vélez-Cordero, J.R., Sámano, D., Yue, P.T., Feng, J.J., Zenit, R., Hydrodynamic interaction between a pair of bubbles ascending in shear-thinning inelastic fluids, J. Non-Newtonian Fluid Mech., vol. 166, 2011, pp. 118–132.
Rabha, S.S., Buwa, V.V., Volume-of-fluid (VOF) simulations of rise of single/multiple bubbles in sheared liquid, Chem. Eng. Sci., vol. 65, 2010, pp. 527–537.
Stanovsky, P., Ruzicka, M., Martins, A., Teixeira, J.A., Meniscus dynamics in bubble formation: A parametric study, Chem. Eng. Sci., vol. 66, 2011, pp. 3258–3267.
Ruzicka, M., Bunganic, R., Drahos, J., Meniscus dynamics in bubble formation. Part I: Experiment, Chem. Eng. Res. Des., vol. 87, 2009, pp. 1349–1356.
Vafaei, S., Wen, D. S., Bubble formation on a submerged micronozzle, J. Colloid Interf. Sci., vol. 343, 2010, pp. 291–297.
Velez-Cordero, J.R., Zenit, R., Bubble cluster formation in shear-thinning inelastic bubbly columns, J. Non-Newtonian Fluid Mech., vol. 166, 2011, pp. 32–41.
Wang, X.W., Zhao, S.W., Wang, H., Pan, T.R., Bubble formation on superhydrophobic-micropatterned copper surfaces, App. Therm. Eng., vol.35, 2012, pp. 112–119.
Kumara, W.A.S., Elseth, G., Halvorsen, B.M., Melaaen, M.C., Comparison of particle image velocimetry and laser Doppler anemometry measurement methods applied to the oil-water flow in horizontal pipe, Flow Meas. Instrum., vol. 21, 2010, pp. 105–117.
Funfschilling, D., Li, H.Z., Effects of the injection period on the rise velocity and shape of a bubble in a non-Newtonian fluid, Chem. Eng. Res. Des., vol. 84, 2006, pp. 875–883.
Iguchi, M., Ueda, H., Uemura, T., Bubble and liquid flow characteristics in a vertical bubbling jet, Int. J. Multiphase Flow, vol. 21, 1995, pp. 861–873.
Financially supported by National Natural Science Foundation of China (21076139, 21106106), Tianjin Natural Science Foundation (12JCQNJC03700), and Foundation of Tianjin Educational Committee of China (20100508).
Rights and permissions
About this article
Cite this article
Fan, W., Yin, X. A laser imaging-LDV coupling measurement of single bubble forming and rising in shear-thinning fluid. J. Therm. Sci. 23, 233–238 (2014). https://doi.org/10.1007/s11630-014-0700-z
- shear-thinning fluid
- bubble formation
- laser Doppler velocimetry
- flow field