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Lateral diffusion of large particles in turbulent pipe flow

Published online by Cambridge University Press:  29 March 2006

B. B. Sharp  and
I. C. O'Neill
B. B. Sharp
Affiliation:
Department of Civil Engineering, University of Melbourne, Victoria, Australia
I. C. O'Neill
Affiliation:
Department of Civil Engineering, University of Melbourne, Victoria, Australia
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Abstract

A closed flow circuit, comprising a smooth horizontal plastic pipe transporting a dilute suspension of plastic particles in water, was modified to produce a satisfactory environment for the detection of mean particle location across a fixed plane normal to the mean turbulent flow direction. It was established that mean concentration in the vicinity of the vertical diameter was a function of the vertical co-ordinate only, and this result enabled the particle diffusivity to be evaluated for a core region of the cross-section. For a particle relative density in the range 1.035 to 1.126 and a variety of flows, a suitable expression for the dimensionless particle diffusivity is A (1 - BW/u) SN, where u is the friction velocity, W the fall velocity for a particle in still water, S the relative density of the suspended material, and A, B and N are constants.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 45 , Issue 3 , 15 February 1971 , pp. 575 - 584
Copyright
© 1971 Cambridge University Press

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References

Baldwin, L. V. & Mickelsen, W. R. 1963 Trans. ASCE 128, 1595.
Barnard, B. J. S. & Binnie, A. M. 1963 J. Fluid Mech. 15, 34.
Batchelor, G. K. 1965 Proc. 2nd Aust. Conf. Hyd. and Fluid Mech.
Batchelor, G. K., Binnie, A. M. & Phillips, O. M. 1955 Proc. Phys. Soc. B, 68, 1095.
Binnie, A. M. & Phillips, O. M. 1958 J. Fluid Mech. 4, 87.
Davidson, J. F., Pearson, J. R. A. & Vanoni, V. A. 1969 J. Fluid Mech. 39, 375.
Flint, D. L., Kada, H. & Hanratty, T. L. 1960 A.I.Ch.E. J. 6, 325.
Houghton, G. 1966 Can. J.Ch.E. 44, 90.
Jobson, H. E. & Sayre, W. W. 1970 Proc. ASCE J. Hyd. Div. 96, 703.
Kreith, F. & Sonju, O. K. 1965 J. Fluid Mech. 22, 257.
Laufer, J. 1954 Advisory Comm. Aeron. Tech. Rep. no. 1174.
Sharp, B. B. 1964 Proc. ASCE J. Hyd. Div. 90, 37.
Sharp, B. B. & O'Neill, I. C. 1968 Proc. 3rd Aust. Conf. Hyd. and Fluid Mech.
Sharp, B. B. & O'Neill, I. C. 1970 First International Conference on the Hydraulic Transport of Solids in Pipes. Coventry: BHRA.
Taylor, G. I. 1954 Proc. Roy. Soc. A, 223, 446.
Vanoni, V. A. 1946 Trans. ASCE 111, 67.