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A theoretical study of liquid‐film spread heights in the calendering of newtonian and power law fluids
Author(s) -
Brazinsky I.,
Cosway H. F.,
Valle C. F.,
Jones R. Clark,
Story V.
Publication year - 1970
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.1970.070141111
Subject(s) - power law , constant (computer programming) , thermodynamics , power law fluid , newtonian fluid , calendering , power (physics) , materials science , law , mechanics , mathematics , physics , composite material , statistics , computer science , political science , programming language
The relationship between spread height and upstream reservoir thickness, with power low coefficient as parameter, was obtained analytically. At all values of n studied, the value of r (ratio of spread height to nip width) increases with increasing values of H / h o where H is upstream reservoir thickness and h o is nip width. At higher values of H / h o , the curves of r , versus H / h o tend to “flatten” out, and r approaches an asymptotic value. For example, the asymptotic value of r for Newtonian fluids (power law constant of 1) is 1.226. Asymptotic values of r increase with decreasing values of the power law constant.