Theory for Normal Stress Measurements in Slits and Capillaries.

Abstract

RY FOR Normal Stress Measurements in Slits and Capillaries.Technical summary rept.,Davies,J. M. ;Walters,K. ;MRC-TSR-1384DA-31-124-ARO(D)-462*Rheology, *Shear stresses, *Capillaries, Partial differential equations, Elastic properties, Polymers, Melting, Pressure gradientsIt is argued that existing experimental results for slits and capillaries are consistent with those obtained by other means in as much as they indicate a second normal stress difference which is negative and smaller than the first normal stress difference. Existing interpretations of these experimantal results which predict a large positive second normal stress difference are in error because they assume that the centreline pressure at the exit of the capillary is zero. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1973
Accession Number
AD0770709

Entities

People

  • J. M. Davies
  • K. Walters

Organizations

  • University of Wisconsin–Madison

Tags

DTIC Thesaurus Topics

  • Differential Equations
  • Elastic Properties
  • Equations
  • Mathematics
  • Measurement
  • Mechanical Properties
  • Microvessels
  • Modulus Of Elasticity
  • Partial Differential Equations
  • Physical Properties
  • Rheology
  • Shear Stresses
  • Stresses

Readers

  • Calculus or Mathematical Analysis
  • Combustion and Flow Dynamics.
  • Mechanical Engineering/Mechanics of Materials.