A Review of Approaches to the Study of Turbulence Modification by Means of Non-Newtonian Additives

Abstract

The addition of small amounts of polymers to Newtonian liquids under conditions of turbulent flow results in substantial reduction of skin friction. This phenomenon has been observed experimentally. It can be attributed to the unusual behavior of dilute polymer solutions in turbulent flows. A condensed review of topics relevent to theoretical study of drag reduction by non- Newtonian additives is presented. In addition, the techniques and results of experimental investigations of this phenomenon are examined. It is proposed that dilute solutions of polymers or surfactants can be rheologically characterized by measuring the secondary flow characteristics that occur in the neighborhood of an oscillating cylinder. Plans for conducting these measurements are presented. Keywords: Drag reduction; Turbulence modifications; Rheology; Non- Newtonian fluid mechanics; Viscoelastic liquids; Polymers; Surfactants.

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Document Details

Document Type
Technical Report
Publication Date
Dec 10, 1987
Accession Number
ADA188799

Entities

People

  • Dimitris Vlassopoulos
  • William R. Schowalter

Organizations

  • Princeton University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Biomedical
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Chemical Synthesis
  • Chemistry
  • Drag
  • Drag Reduction
  • Elastic Properties
  • Flow Visualization
  • Fluid Flow
  • Fluid Mechanics
  • Heat Transfer
  • Hydrodynamics
  • Mass Transfer
  • Measurement
  • Mechanics
  • Polymer Degradation
  • Skin Friction
  • Turbulent Flow

Readers

  • Fluid Dynamics.
  • Polymer Science and Engineering.
  • Systems Analysis and Design