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Accuracy of the parallel‐plate analogy for representation of viscous flow between coaxial cylinders
Author(s) -
Worth R. A.
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070240201
Subject(s) - coaxial , mechanics , drag , flow (mathematics) , radius , newtonian fluid , power law fluid , physics , materials science , mathematics , classical mechanics , mechanical engineering , engineering , computer science , computer security
The accuracy of the parallel‐plate approximation to represent various viscous flows of non‐Newtonian fluids between coaxial cylinders is investigated. Four types of flow are considered: tangential drag flow, tangential pressure flow, and axial pressure flow. The solutions for flow between parallel plates are compared with the exact solutions, and the errors are plotted against radius ratio for a number of values of the power‐law index to provide an indication of the range of usefulness of the parallel‐plate analogy.