EVALUATION ON THE VALIDITY OF THE HYDRAULIC RADIUS FOR THE ANALYSIS OF FLOW IN OPEN CHANNELS

AN ANALYSIS IS MADE OF MEASUREMENTS IN SMOOTH RECTANGULAR CHANNELS TO EVALUATE THE EFFECT OF THE CHANNEL ASPECT RATIO ON RESISTANCE TO FLOW. FROM THE ANALYSIS THE VALIDITY OF THE HYDRAULIC RADIUS AS THE SOLE GEOMETRICAL QUANTITY FOR USE IN THE COMPUTATION OF TURBULENT UNIFORM FLOW IN OPEN CHANNELS IS APPRAISED. IT IS SHOWN THAT WHILE THE RELATIONSHIP IS NOT WELL DEFINED, THE ASPECT RATIO OF A SMOOTH RECTANGULAR CHANNEL DOES HAVE SOME EFFECT ON THE RESISTANCE TO FLOW. GRAPHS OF AVERAGE VELOCITY VERSUS HYDRAULIC RADIUS ARE PRESENTED FOR CHANNELS OF THE SAME SLOPE AND HYDRAULIC RADIUS, BUT WITH DIFFERENT ASPECT RATIOS. THE RELATIONSHIP BETWEEN THE FRICTION FACTOR AND REYNOLDS NUMBER IS COMPARED WITH SIMILAR DATA TAKEN BY OTHER INVESTIGATORS. IT IS SHOWN THAT USE OF THE HYDRAULIC RADIUS WITHOUT A CORRECTION FACTOR FOR SHAPE WILL RESULT IN SMALL ERRORS IN COMPUTATIONS FOR RECTANGULAR CHANNELS. /AUTHOR/

  • Corporate Authors:

    Auburn University

    Auburn, AL  United States  36830
  • Authors:
    • Grigg, N S
  • Publication Date: 1964

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Filing Info

  • Accession Number: 00204089
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM