The distributions of suspended 24-28, 40-50, and 80-100 mesh sand particles and of 100-150 mesh nickel particles were measured by a gamma-ray absorption technique in a horizontal channel with a 0.972 x 3.976 in. cross section at mean mixture flow velocities of 4.24-12.61 ft/sec and at average dimensionless transport concentrations of 0.024-0.28; from these data, the eddy diffusivities were calculated. Turbulent suspension of the particles appeared to occur at low particle concentrations, at small particle diameters (less than 0.2 mm), and at particle settling velocity/flow friction velocity ratios of less than 0.2:1; outside these limits the concentration profiles deviated significantly from those usually associated with turbulent suspensions, which could be due to particle interactions. The eddy diffusivity in the equation governing the concentration profiles was found to be of the same order of magnitude as the eddy diffusivities for momentum and mass in single-phase fluids. High solid concentrations were found to increase the suspending capacity of the fluid, rather than to "damp" the turbulence. The results of this study can be extended to predict the solids concentration distributions in circular pipes.

  • Corporate Authors:

    Canadian Society for Chemical Engineers

    151 Slater Street
    Ottawa 4, ONo,   Canada 
  • Authors:
    • Shook, C A
    • Daniel, S M
  • Publication Date: 1968-8

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00056034
  • Record Type: Publication
  • Source Agency: American Petroleum Institute
  • Files: TRIS
  • Created Date: Jun 24 1974 12:00AM