Behavior of Polymer Solutions and Melts in Shearing and Elongational Flow Using Streak Photography and Birefringence
type: CreativeWork
description: An experimental analysis has been carried out for the kinematics of a Newtonian (glycerin solution) and a non-Newtonian (polyacrylamide solution) fluid undergoing flow past a radially oriented cylinder in both a converging and uniform flow field. The glycerin and polyacrylamide solutions are found to follow Newtonian and power law behavior, respectively, in Poiseuille flow between parallel plates and the lubrication approximation was found to give an accurate description of the kinematics in the converging flow geometry. The local flow kinematics near the cylinder end were, however, found in the two flow geometries to be the same for both fluids and well described by the solution to the Stokes equations for constant free stream flow past a long slender prolate spheroid. Elongation rates in the vicinity of the cylinder axis are significantly enhanced over those in the mainstream and in a region within about two diameters downstream of the cylinder end the kinematics can be classifed as "strong" becoming "weak" thereafter.
abstract: An experimental analysis has been carried out for the kinematics of a Newtonian (glycerin solution) and a non-Newtonian (polyacrylamide solution) fluid undergoing flow past a radially oriented cylinder in both a converging and uniform flow field. The glycerin and polyacrylamide solutions are found to follow Newtonian and power law behavior, respectively, in Poiseuille flow between parallel plates and the lubrication approximation was found to give an accurate description of the kinematics in the converging flow geometry. The local flow kinematics near the cylinder end were, however, found in the two flow geometries to be the same for both fluids and well described by the solution to the Stokes equations for constant free stream flow past a long slender prolate spheroid. Elongation rates in the vicinity of the cylinder axis are significantly enhanced over those in the mainstream and in a region within about two diameters downstream of the cylinder end the kinematics can be classifed as "strong" becoming "weak" thereafter.
author: Mackay, Michael Edwin
keywords: Engineering, Chemical
date published: 2014-12-15T19:54:24Z
date modified: 2026-07-22T22:26:01Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois at Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/69756