INFLUENCE OF PARTICLE DIAMETER ON THE TURBULENT SUPPORT OF SOLIDS IN PIPELINE FLOW

The efficiency, and hence economic feasibility, of solids pipelines is directly related to the effectiveness of turbulent suspension. However, the influence of turbulent suspension is not usually taken into account in scaling up pilot-plant data because of the assumption that its effect is independent of pipe size. Experimental results have indicated that this assumption is incorrect unless the particles are 'small' relative to the diameter of the pipe. To account for the effect of particle size, a model of the suspension process has been developed based on the statistical theory of turbulence. This model shows that the threshold velocity for turbulent suspension is a simple exponential function of the ratio of particle diameter to pipe diameter. Experimental results from four different laboratories were analyzed. They showed agreement with the functional relation predicted by the model and gave a provisional evaluation of the two coefficients in the relation.

  • Supplemental Notes:
    • Presented at HYDROTRANSPORT 3--Third International Conference on the Hydraulic Transport of Solids in Pipes, Colorado School of Mines, Golden, Colo., May 15-17, 1974. Sponsored by BHRA Fluid Engineering. Complete set of Conference papers available for $45.00.
  • Corporate Authors:

    Colorado School of Mines

    1500 Illinois Street
    Golden, CO  USA  80401
  • Authors:
    • Wilson, K C
    • Watt, W E
  • Publication Date: 1974-5

Media Info

  • Pagination: 7 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00056460
  • Record Type: Publication
  • Source Agency: British Hydrodynamics Research Association
  • Report/Paper Numbers: Paper D1
  • Files: TRIS
  • Created Date: Jul 15 1974 12:00AM