Experiments are reported which were carried out in open channel flow in a laboratory flume; and turbulent structures of both clear water flow and sediment-laden flow, which were kept under exactly the same conditions, were measured, compared and analyzed. It was found that the various statistical parameters of turbulence measured in clear water flow are essentially consistent with those obtained by other researchers. The turbulent intensity decreases with increase in concentration. In sediment-laden flow, the probability density distribution and the autocorrelation coefficient are similar to those of the clear water flow. Turbulent frequency decreases and turbulent energy is concentrated to large-size eddies with low frequency. The longitudinal sizes of macroscale and microscale eddies increase. It was found that for a Newtonian flow with noncohesive particles, the fundamental turbulent structure has no essential change - only the turbulent intensity and frequency have some changes in magnitude. These and other findings are discsussed.

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  • Accession Number: 00486414
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 31 1989 12:00AM