Influence of Wall Strain Rate, Polymer Concentration and Channel Height upon Drag Reduction and Turbulent Structure

Abstract

This study investigated fully developed, low polymer concentration, drag-reduced flows in two dimensional channels. Water flows at equal wall shear stress were also measured for comparison with the drag--reduced flows. The first objective of this study was to determine the dependence of drag reduction and turbulent structure upon wall strain rate, average polymer concentration and channel height. The second objective was to test a scale-up procedure for predicting drag reduction in one channel based on results in another channel. Keywords: Drag reduction; Turbulent wall flows. (JES)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1989
Accession Number
ADA215378

Entities

People

  • Kenneth J. Harder
  • William G. Tiederman

Organizations

  • Purdue University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • Birds
  • Boundary Layer
  • Channel Flow
  • Chemical Engineering
  • Engineering
  • Flow
  • Flow Visualization
  • Laser Velocimeters
  • Measurement
  • Mechanical Engineering
  • Pipe Flow
  • Regression Analysis
  • Shear Stresses
  • Standards
  • Turbulent Boundary Layer
  • Turbulent Flow
  • Two Dimensional

Readers

  • Aerodynamics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Polymer Science and Technology