scholarly journals Correction: Time-dependent shear rate inhomogeneities and shear bands in a thixotropic yield-stress fluid under transient shear

Soft Matter ◽  
2020 ◽  
Vol 16 (40) ◽  
pp. 9393-9393
Author(s):  
Yufei Wei ◽  
Michael J. Solomon ◽  
Ronald G. Larson
Keyword(s):  
Shear Rate ◽  
Yield Stress ◽  
Soft Matter ◽  
Shear Bands ◽  
Time Dependent ◽  
Yield Stress Fluid

Correction for ‘Time-dependent shear rate inhomogeneities and shear bands in a thixotropic yield-stress fluid under transient shear’ by Yufei Wei et al., Soft Matter, 2019, 15, 7956–7967, DOI: 10.1039/C9SM00902G.

Time-dependent shear rate inhomogeneities and shear bands in a thixotropic yield-stress fluid under transient shear

Soft Matter ◽  
2019 ◽  
Vol 15 (39) ◽  
pp. 7956-7967 ◽  
Author(s):  
Yufei Wei ◽  
Michael J. Solomon ◽  
Ronald G. Larson
Keyword(s):  
Shear Rate ◽  
Yield Stress ◽  
Fumed Silica ◽  
Shear Banding ◽  
Shear Bands ◽  
Flow Reversal ◽  
Time Dependent ◽  
Yield Stress Fluid ◽  
Silica Suspension

We study the rheological responses and shear-rate inhomogeneities and shear banding behaviors of a thixotropic fumed silica suspension in shear startup tests and flow reversal tests.

scholarly journals Thixotropic Behavior of Reconstituted Debris-Flow Mixture

Water ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 153
Author(s):  
Leonardo Schippa ◽  
Ferruccio Doghieri ◽  
Anna Maria Pellegrino ◽  
Elisa Pavesi
Keyword(s):  
Steady State ◽  
Shear Rate ◽  
Yield Stress ◽  
Initial Conditions ◽  
Sediment Concentration ◽  
Time Dependent ◽  
Initial State ◽  
Creep Tests ◽  
Lower Shear ◽  
Short Period

Time-dependent rheological properties and thixotropy of reconstituted debris-flows samples taken from channel bank deposits are examined using a commercial rheometer equipped with a vane rotor geometric system. Sweep tests and creep tests were carried out involving mixtures having different grain concentrations ranging between 50% and 58%. Different initial conditions of the mixtures were considered in order to analyze the effects of aging and rejuvenation (thixotropy) over a short period of time and long period of time. Tested slurries show viscosity bifurcation, yield stress and time-dependent behavior. According to the experimental results, three different regimes were identified: a lower shear rate regime, corresponding to a shear rate lower than the critical value; an intermediate banding shear rate regime characterized by static and dynamic yield stress level; and a higher shear rate regime where the flowing debris behaves as a non-Newtonian fluid characterized by a constant steady state ultimate apparent viscosity. In any case, the initial state of the mixture and the sediment concentration affects the ultimate steady state rheology and the time-dependent (thixotropy) slurries’ behavior.

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