Turbulent Flow of Drag-Reducing Suspensions

Abstract

The friction-reducing properties of fiber suspensions were investigated. Fibers of asbestos, glass, and acrylic were found to greatly reduce the turbulent-flow resistance of both aqueous and non-aqueous suspending fluids. Pipe-flow and rotating-disk experiments show that fibers having the smallest diameter, and substantial length-to-diameter ratio gave the most friction reduction at the smallest weight concentration of fiber. An asbestos fiber gave 65 percent friction reduction in a small pipe-flow apparatus and 48 percent in the rotating-disk equipment (both being the maximum obtainable in the devices) at a suspension concentration of 500 ppm.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1972
Accession Number
AD0746485

Entities

People

  • J. W. Hoyt

Tags

DTIC Thesaurus Topics

  • Angular Motion
  • Chemical Synthesis
  • Chemistry
  • Computational Fluid Dynamics
  • Dispersions
  • Drag
  • Drag Reduction
  • Fibers
  • Fluid Flow
  • Glass Fibers
  • Laminar Flow
  • Materials
  • Measurement
  • Physical Chemistry
  • Pipe Flow
  • Reynolds Number
  • Turbulent Flow

Readers

  • Aerosol Science/Aerosol Physics
  • Mathematics or Statistics
  • Polymer Science and Technology