DIFFUSION AND DISPERSION IN OPEN CHANNEL FLOW

THE LATERAL TURBULENT DIFFUSION AND LONGITUDINAL DISPERSION COEFFICIENTS WERE RELATED TO THE PARAMETERS THAT MAKE UP THE STRUCTURE OF THE FLOW. THE RESISTANCE TO FLOW FOR THESE RUNS VARIED FROM 10.6 TO 4.4. THIS RELATION FOR THE LATERAL TURBULENT DIFFUSION COEFFICIENT WAS NOT AFFECTED BY THE SECONDARY CIRCULATION THAT WAS PRESENT IN ALL OF THE FLOWS AND IS THE SAME AS THAT GIVEN BY OTHER RESEARCHERS FOR A LARGE RANGE OF FLOW CONDITIONS. THE DISPERSION COEFFICIENT VARIED WITH RESISTANCE TO FLOW AND THE AVERAGE VELOCITY. LONGITUDINAL DIFFUSION, WHICH DEPENDS ON THE TURBULENCE OF THE FLOW, WAS AN INSIGNIFICANT FACTOR IN THE DISPERSION COEFFICIENT AS COMPARED TO THE DISTRIBUTION OF THE LOCAL MEAN VELOCITY IN THE LATERAL AND VERTICAL DIRECTION.

• Supplemental Notes:
  • PROC PAPER 10298 2 APP
• Authors:
  • Miller, A C
  • Richardson, E V
• Publication Date: 1974-1

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 159-71
• Serial:
  • Journal of the Hydraulics Division
  • Volume: 100
  • Issue Number: hy1
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Diffusion (Optics); Flow resistance; Hydraulics; Open channels; Turbulence
• Old TRIS Terms: Dispersion
• Subject Areas: Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 00204539
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 27 1974 12:00AM