THE SPATIAL SOLID CONCENTRATION AND THE CRITICAL VELOCITY

An equation for predicting the mean spatial solid concentration in a horizontal pipe has been derived and the unknown parameter in it was determined by the analysis of the experimental data. The solid concentration ratio, g/C, or the ratio of the spatial solid concentration, q, to the delivered one, C, is considered with respect to the flow parameter, psi equals (V squared/gD(s-1)) x square root (C sub d). Both calculated and experimental values of q/C increased conspicuously in the range of psi less than, approximately, 3. This means that in this range of flow the stationary bed begins to form. Two head loss equations including the spatial solid concentration instead of the delivered one were given for the separate range of psi, or psi less than and greater than 3. By differentiating the head loss equation, the critical velocity that corresponds to a minimum head loss point was discussed and compared with other proposals.

  • 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:
    • Okude, T
    • YAGI, T
  • Publication Date: 1974-5

Media Info

  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00056464
  • Record Type: Publication
  • Source Agency: British Hydrodynamics Research Association
  • Report/Paper Numbers: Paper E2
  • Files: TRIS
  • Created Date: Jul 15 1974 12:00AM