Experiments in Fluids

, Volume 36, Issue 2, pp 326–333 | Cite as

Bubble aspect ratio and velocity measurement using a four-point fiber-optical probe

Original

Abstract

We propose a new algorithm to estimate the bubble’s aspect ratio and its velocity from the time series obtained by a four-point fiber-optical probe. The accuracy and the robustness of the algorithm is analyzed for bubbles with an equivalent diameter of 2–4 mm using both synthetic and experimental data. The experimental data is obtained by means of stereoscopic high-speed imaging. The three dimensional shape of the bubble is reconstructed from a set of stereoscopic contour lines.

References

  1. Barrau E, Rivière N, Poupot C, Cartellier A (1999) Single and double optical probes in air-water two-phase flows: real time signal processing and sensor performance. Int J Mutiphase Flow 25:229–256CrossRefGoogle Scholar
  2. Cartellier A (1992) Simultaneous void fraction measurement, bubble velocity, and size estimate using a single optical probe in gas-liquid two-phase flows. Rev Sci Instrum 63:5442–5453Google Scholar
  3. Cartellier A (2001) Optical Probes for Multiphase Flow Characterization: Some Recent Improvements. Chem Eng Technol 24:535–538CrossRefGoogle Scholar
  4. Cipolla R(1998) The visual motion of curves and surfaces. Phil Trans R Soc London A 356:1103–1121CrossRefGoogle Scholar
  5. Clift R, Grace JR, Weber ME (1978) Bubbles, drops and particles. Academic Press, New YorkGoogle Scholar
  6. Fortunati R, Guet S, Ooms G, Oliemans RVA, Mudde RF (2002) Accuracy and feasibility of bubble dynamic measurement with four point optical fiber probes. In: 11th symposium on application of laser technique to fluid mechanics, 8–11 July, LisboaGoogle Scholar
  7. Frijlink JJ (1987) Physical aspects of gassed suspension reactors. PhD thesis, Delft University of TechnologyGoogle Scholar
  8. Hamad FA, Imberton F, Bruun HH (1997) An optical probe for measurements in liquid-liquid two-phase flow. Meas Sci Technol 8:1122–1132CrossRefGoogle Scholar
  9. Hamad FA, Pierscionek BK, Bruun HH (2000) A dual optical probe for volume fraction, drop velocity and drop size measurements in liquid-liquid two-phase flow. Meas Sci Technol 11:1307–1318CrossRefGoogle Scholar
  10. Magnaudet J, Eames I (2000) The motion of high-Reynolds-number bubbles in inhomogeneous flows. Ann Rev Fluid Mech 32:659–708CrossRefGoogle Scholar
  11. Mougin G, Magnaudet J (2002) Path instability of a rising bubble. Phys Rev Lett 88:014502CrossRefPubMedGoogle Scholar
  12. Mudde RF, Saito T (2001) Hydrodynamical similarities between bubble column and bubbly pipe flow. J Fluid Mech 437:203–228CrossRefGoogle Scholar
  13. Press WH, Teukolsky SA, Vetterling WT, Flannery BP (1992) Numerical recipes in C: the art of scientific computing. Cambridge University Press, CambridgeGoogle Scholar
  14. Saito T, Mudde RF (2001) Performance of 4-tip optical fiber probe and bubble characterizaions by the probe in turbulent bubbly flows. In: Fourth international conference on multiphase flow, 27 May – 1 June, New OrleansGoogle Scholar
  15. Tomiyama A, Tamai H, Zun I (2002) Transverse migration of single bubbles in simple shear flows. Chem Eng Sci 57:1849–1858CrossRefGoogle Scholar
  16. Tsai RY (1987) A versatile camera calibration technique for high-accuracy 3D machine vision metrology using off-the-shelf TV cameras and lenses. IEEE J Robotics Autom RA-3:323–344Google Scholar
  17. de Vries A (2001) Path instability of a rising bubble. PhD Thesis, Twente UniversityGoogle Scholar
  18. de Vries A, Luther S, Lohse D (2002) Induced shape oscillations and their impact on the rise velocity. Eur Phys J B 29:503–509CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  1. 1.Department of Applied Physics and J.M. Burgers Center for Fluid DynamicsUniversity of TwenteEnschedeThe Netherlands
  2. 2.Laboratory for Aero and Hydrodynamics and J.M. Burgers Center for Fluid DynamicsDelft University of TechnologyDelftThe Netherlands

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