Modelling Polymers as Compressible Elastic Spheres in Couette Flow

A model of polymer chains as compressible elastic spheres in flow is presented. The spherical polymer blobs are assumed to compress in simple Couette flow in accord with recent rheo-optic measurements on semi-dilute solutions. The experimentally determined decrease in radius with increasing shear ra...

Full description

Bibliographic Details
Published in:Substantia
Main Authors: Donglin Xie, Dave E. Dunstan
Format: Article
Language:English
Published: Firenze University Press 2017-03-01
Subjects:
Semi-dilute Polymer solutions
Couette Flow
compression
modelling
power law
Online Access:https://riviste.fupress.net/index.php/subs/article/view/10
Description
Summary:A model of polymer chains as compressible elastic spheres in flow is presented. The spherical polymer blobs are assumed to compress in simple Couette flow in accord with recent rheo-optic measurements on semi-dilute solutions. The experimentally determined decrease in radius with increasing shear rate is predicted by the model. Furthermore, the model predicts power law exponents for the viscosity-shear rate within the range of measured values for polymer chains.
ISSN:2532-3997

Similar Items