Premium
Shear flow experiments in an assembly of gel beads and modelling of bingham behavior
Author(s) -
Lequeux François,
Grosshans Daniel,
Hocquart Roger
Publication year - 1992
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1992.220030105
Subject(s) - materials science , rheology , bingham plastic , newtonian fluid , mechanics , viscosity , flow (mathematics) , non newtonian fluid , shear (geology) , elastic modulus , composite material , physics
In this paper, we present a rheological study of a compact layer of highly swollen gel beads. The flow regimes of these systems are modelled by an elastic sinusoid moving in a Newtonian fluid. This model predicts a yield stress varying with the square root of the elastic modulus of the gel bead. The slope at the origin (at zero velocity) of the flow curve is expected to depend only on geometrical parameters and on the solvent viscosity. The experimental data are in qualitative agreement with the theoretical predictions.