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A new method to measure particle turbulent dispersion using laser doppler anemometer

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Abstract

A laser doppler anemometer (LDA) was used to measure local dispersion coefficients of particles in turbulent flow. The experimental set-up is described along with the data acquisition equipment and processing procedures. Results for 5 μ particles dispersing from a point source in pipe flow are shown. A second estimate for the diffusivity was obtained from mean square dispersion measurements.

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Abbreviations

A :

projected area of LDA measuring volume, normal to pipe axis

B 0 − B 2 :

coefficients used in concentration curve fits

C :

particle number density, concentration

d f :

fringe spacing

f B :

Bragg cell frequency shift

f D :

frequency of Doppler signal

H :

LDA measuring volume dimension in pipe axial direction

h :

random variation in H

J :

particle flux

J 0, J 1 :

bessel function of zeroth and first order

r :

radial location

t :

time

U :

axial velocity

u :

fluctuating component of axial velocity

vp :

average particle radial velocity

x :

axial coordinate

y :

position of particle in the direction normal to the mean flow relative to the centerline

\(\overline {y^2 } \) :

mean square dispersion

β2,3 :

roots of Bessel functions

ε p :

turbulent diffusivity of particles

λ:

laser wave length

θ:

laser beam intersection angle

References

  • Arnason, G. 1982: Measurement of particle dispersion in turbulent pipe flow. Ph.D. diss., Pullman, Washington State University

    Google Scholar 

  • Barnard, B. J. S.; Binnie, A. M. 1962: The vertical diffusivity and mean velocity of particles in a horizontal water pipe. J. Fluid Mech. 15, 35–48

    Google Scholar 

  • Buchhave, P. 1979: The measurements of turbulence with the burst-type laser Doppler anemometer-errors and correction methods. Ph.D. diss., Buffalo, State University of New York

    Google Scholar 

  • Durst, F.; Melling, A.; Whitelaw, J. H. 1976: Principles and Practice of Laser-Doppler anemometry. New York: Academic Press

    Google Scholar 

  • Goldschmidt, V.; Eskinazi, S. 1966: Two-phase flow in a plane jet. J. Appl. Mech. Dec., 735–747

  • Hedman, P. O.; Smoot, L. D. 1975: Particle-gas dispersion effects in confined coaxial jets. AIChE 121(2), 372–279

    Google Scholar 

  • Hinze, J.O. 1975: Turbulence. New York: McGraw-Hill

    Google Scholar 

  • Laufer, J. 1954: The structure of turbulence in fully developed pipe flow. Report NACA-TR-1174

  • Stock, D. E.; Fadeff, K. G. 1981: Measuring particle transverse velocity using an LDA. Measurement in Polyphase Flow -1982, ASME, ed. Heidrick and Patel, 87–90

  • Travis, J. R.; Buhr, H. D.; Sesonske, A. 1971: A model for velocity and eddy diffusivity distributions in fully turbulent pipe flow. Can. J. Chem. Eng. 19, 14–18

    Google Scholar 

  • Wells, M. R. 1982: The effects of crossing trajectories on the diffusion of particles in a turbulent fluid. Ph.D. diss., Pullman, Washington State University

    Google Scholar 

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Author notes

  1. G. Arnason

    Present address: Mech. Eng. Dept., University of Idaho, 83843, Moscow, Idaho, USA

Authors and Affiliations

  1. Department of Mechanical Engineering, Washington State University, 99164-2920, Pullman, Wash, USA

    G. Arnason & D. E. Stock

Authors
  1. G. Arnason
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  2. D. E. Stock
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Arnason, G., Stock, D.E. A new method to measure particle turbulent dispersion using laser doppler anemometer. Experiments in Fluids 2, 89–93 (1984). https://doi.org/10.1007/BF00261327

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  • DOI: https://doi.org/10.1007/BF00261327

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