Interdisciplinary Research on Viscoelasticity and Rheology

Abstract

Viscoelastic materials with fading memory, e.g. polymers, suspensions, emulsions, exhibit behavior that is intermediate between the nonlinear hyperbolic response of purely elastic materials and the strongly diffusive, parabolic response of viscous fluids. The following problems that are an outgrowth of earlier research were investigated during the reporting period: Provide numerical and analytic explanation of several striking phenomena observed in experiments in shear flows of highly elastic and very viscous non- Newtonian fluids in pressure-driven and piston-driven flows and in Couette flow. Such phenomena can lead to material instabilities deemed capable of severely disrupting advanced materials engineering and process design problems of polymer melts that include spinning of synthetic fibers and injection molding.

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Document Details

Document Type
Technical Report
Publication Date
Dec 14, 1990
Accession Number
ADA232700

Entities

People

  • John A. Nohel

Organizations

  • University of Wisconsin–Madison

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Human Systems

DTIC Thesaurus Topics

  • Advanced Materials
  • Boundary Value Problems
  • Computational Fluid Dynamics
  • Computational Science
  • Couette Flow
  • Differential Equations
  • Elastic Materials
  • Equations
  • Flow
  • Fluid Flow
  • Materials
  • Materials Engineering
  • Polymers
  • Shear Flow
  • Steady Flow
  • Steady State
  • Two Dimensional Flow

Readers

  • Fluid Dynamics.
  • Reinforced Composite Materials