Results 1 to 10 of about 11,827 (303)
Thixotropy in macroscopic suspensions of spheres [PDF]
Physical Review E, 2002 An experimental study of the viscosity of a macroscopic suspension, i.e. a suspension for which Brownian motion can be neglected, under steady shear is presented. The suspension is prepared with a high packing fraction and is density-matched in a Newtonian carrier fluid. The viscosity of the suspension depends on the shear rate and the time of shearing.
B.J. Ackerson +27 more
arxiv +10 more sources
New insights on carbon black suspension rheology -- anisotropic thixotropy and anti-thixotropy [PDF]
Journal of rheology, 2022 We report a detailed experimental study of peculiar thixotropic dynamics of carbon black (CB, Vulcan XC-72) suspensions in mineral oil, specifically the observation of sequential stress increase then decrease at a fixed shear rate in a step-down test.
Yilin Wang, Randy H. Ewoldt
arxiv +5 more sources
Aging, rejuvenation and thixotropy in complex fluids. Time-dependence of the viscosity at rest and under constant shear rate or shear stress [PDF]
arXiv, 2008 Complex fluids exhibit time-dependent changes in viscosity that have been ascribed to both thixotropy and aging. However, there is no consensus for which phenomenon is the origin of which changes. A novel thixotropic model is defined that incorporates aging.
Quemada, Daniel
arxiv +8 more sources
Distinguishing thixotropy from viscoelasticity [PDF]
Journal of Rheology 65, 663 (2021), 2021 Owing to nonlinear viscoelasticity, materials often show characteristic features that resemble those of thixotropy. This issue has been debated in the literature over the past several decades, and several experimental protocols have been proposed to distinguish thixotropy from viscoelasticity.
Mayank Agarwal +3 more
arxiv +8 more sources
Thixotropy, non-monotonic stress relaxation, and the second law of thermodynamics [PDF]
Journal of Rheology 66, 111 (2022), 2021 Many thixo-viscoelastic materials have been reported to undergo enhancement in elastic modulus with time and decrease in the same under application of deformation field. Incorporation of this feature in a viscoelastic structural kinetic model has an apparent possibility of violating the second law of thermodynamics.
Yogesh M. Joshi
arxiv +5 more sources
Distinguishing thixotropy, anti-thixotropy, and viscoelasticity using hysteresis [PDF]
arXiv, 2022 Thixotropy, anti-thixotropy, and viscoelasticity are three types of time-dependent dynamics that involve fundamentally different underlying physical processes. Yet distinguishing them can be very challenging, which hinders the understanding of structure-property relations.
Wang, Yilin, Ewoldt, Randy H.
arxiv +3 more sources
Sedimentation Volume and Thixotropy [PDF]
Bulletin of the Chemical Society of Japan, 1938 Abstract (1) Measurements were carried out on the sedimentation volume when a powder settled in an organic liquid or solution. (2) A parallelism was found between the large sedimentation volume of the powder and thixotropic nature of the system.
Hideo Akamatu
openaire +3 more sources
Insights in thixotropic concrete pumping by a Poiseuille flow extension [PDF]
Applied Rheology, 2020 Thixotropy is a reversible time-dependent phenomenon in fluids, in which an internal structure grows due to flocculation and breaks down under shear action. Numerous fluids are thixotropic, e.g. concretes and cementitious suspensions. Pumping of concrete
De Schryver Robin, De Schutter Geert
doaj +2 more sources
Thixotropy in Viscoplastic Drop Impact on Thin Films [PDF]
Phys. Rev. Fluids 6, 043301 (2021), 2020 We use high-speed imaging to study the effect of thixotropic aging in drop impact of yield-stress fluids on pre-coated substrates. Our results reveal that drop splashing is suppressed for "aged" compared to "unaged" samples, indicating that thixotropic breakdown timescales during impact are long enough to affect the dynamics.
Samya Sen +2 more
arxiv +3 more sources
Transient Shear Banding in a Simple Yield Stress Fluid [PDF]
, 2010 We report a large set of experimental data which demonstrates that a simple yield stress fluid, i.e. which does not present aging or thixotropy, exhibits transient shear banding before reaching a steady state characterized by a homogeneous, linear velocity profile.
Barentin, Catherine +3 more
arxiv +6 more sources