Abstract
In multiphase flow research and many industrial applications it is important to determine the bubble size and velocity. To achieve this, one of approaches is to utilize laser phase-Doppler anemometry. However, it was found that the second order refraction has great impact on PDA sizing method when the relative refractive index of media is less than one. In this paper, the problem of second order refraction is investigated and a model of phase-size correlation to eliminate the measurement errors is introduced for bubble sizing. As a result, the model relaxes the assumption of single scattering mechanism in conventional phase-Doppler anemometry. The results of simulations based on this new model by using Generalized Lorenz Mie Theory (GLMT) are compared with those based on the conventional method. An optimization method for accurately sizing air-bubble in water has been suggested.
Similar content being viewed by others
References
Aizu, Y., Durst, F., Grehan, G., Onofri, F. and Xu, T-H., 1993, “PDA Systems Without Gaussian Beam Defects.”Presented at 3rd International Conference on Optical Particle Sizing, Yokohama, Japan, August 23–26.
Durst, F., Tropea, C. and Xu, T. -H., 1994, “The Slit Effect in Phase Doppler Anemometry,”Proceedings of second International Conference on Fluid Dynamic Measurement and Its Applications, Edited by X. Shen and X. Sun, Published by International Academic Publishers, Beijing, pp. 38–43.
Grehan, G., Gouesbet, G., Naqwi, A., and Durst, F., 1991, “Evaluation of Phase Doppler System using Generalized Lorenz-Mie Theory,”Presented at the International Conference on Multiphase Flows ’91-Tsukuba, Japan, September 24–27.
Qiu, H. -PL, and Hsu, C. T., 1996, “A Fourier Optics Method for the Simulation of Measurement-Volume-Effect By the Slit Constraint,”Presented at 8th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, July 8–11.
Qiu, H. -H. and Hsu, C. T., 1999, “Method of Phase-Doppler Anemometry Free From The Measurement-Volume Effect,”Applied Optics, Vol. 38, Iss 13, pp. 2737–2742.
Qiu, H. -H., and Sommerfeld, M., 1992, “The Impact of Signal Processing on the Accuracy of Phase-Doppler Measurements,”Presented at the Sixth Workshop on Two Phase Flow Predictions, Erlangen, Germany, March 30–April 2.
Saffman, M., 1986, “The Use of Polarized Light for Optical Particle Sizing,”Presented at 3rd Int. Symposium on Applications of Laser Anemometry to Fluid Mechanics, Lisbon, Portugal, July 14–17.
Sankar, S. V., Inenaga, A. S., and Bachalo, W. D., 1992, “Trajectory Dependent Scattering in Phase Doppler Interferometer: Minimizing and Eliminating Sizing Errors,”Presented at 6th International Symposium on Applications of Laser Anemometry to Fluid Mechanics, Lisbon, Portugal, July 20–23.
Tropea, C, Xu, T. -H., Onofri, F., Grehan, G. and Haugen, P., 1994, “Dual Mode Phase Doppler Anemometry,”Presented at 7th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, July 8–11.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Qiu, H., Hsu, C.T. & Liu, W. The effect of second order refraction on optical bubble sizing in multiphase flows. KSME International Journal 15, 1801–1807 (2001). https://doi.org/10.1007/BF03185137
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF03185137