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Parallel Plate Viscometry for Glass at High Viscosity
Author(s) -
Joshi Dhananjay,
Joseph Paul F.
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12763
Subject(s) - viscometer , viscosity , viscoelasticity , materials science , slip (aerodynamics) , mathematics , interpolation (computer graphics) , limit (mathematics) , composite material , upper and lower bounds , range (aeronautics) , thermodynamics , mathematical analysis , mechanics , mineralogy , chemistry , physics , classical mechanics , motion (physics)
A simple formula is provided to estimate viscosity of glass using parallel plate viscometry well above 10 8 Pa·s, which is the upper limit of the recommended range. The formula is based on computational studies that account for viscoelastic material behavior and frictional slip that justify using linear interpolation to estimate viscosity between established upper and lower bounds. The formula accounts for variations in friction coefficient and cylinder aspect ratio for viscosity from 10 7 to 10 11 Pa·s.