Viscosity function for yield-stress liquids
PR Souza Mendes, ESS Dutra - Applied Rheology, 2004 - degruyter.com
PR Souza Mendes, ESS Dutra
Applied Rheology, 2004•degruyter.comA viscosity function for highly-shear-thinning or yield-stress liquids such as pastes and
slurries is proposed. This function is continuous and presents a low shear-rate viscosity
plateau, followed by a sharp viscosity drop at a threshold shear stress value (yield stress),
and a subsequent power-law region. The equation was fitted to data for Carbopol aqueous
solutions at two different concentrations, a drilling fluid, an water/oil emulsion, a commercial
mayonnaise, and a paper coating formulation. The quality of the fittings was generally good.
slurries is proposed. This function is continuous and presents a low shear-rate viscosity
plateau, followed by a sharp viscosity drop at a threshold shear stress value (yield stress),
and a subsequent power-law region. The equation was fitted to data for Carbopol aqueous
solutions at two different concentrations, a drilling fluid, an water/oil emulsion, a commercial
mayonnaise, and a paper coating formulation. The quality of the fittings was generally good.
Abstract
A viscosity function for highly-shear-thinning or yield-stress liquids such as pastes and slurries is proposed. This function is continuous and presents a low shear-rate viscosity plateau, followed by a sharp viscosity drop at a threshold shear stress value (yield stress), and a subsequent power-law region. The equation was fitted to data for Carbopol aqueous solutions at two different concentrations, a drilling fluid, an water/oil emulsion, a commercial mayonnaise, and a paper coating formulation. The quality of the fittings was generally good.
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