Article
Polymer Science
Meng-Ge Li, Yan Wu, Qin-Liu Cao, Xin-Yi Yuan, Xiong Chen, Jun-Li Han, Wei-Tao Wu
Summary: This paper studies the rheological properties of organic kerosene gel and fits constitutive models to describe the relationship between viscosity and shear rate, temperature, and shear history. It is found that intense pre-shear can reduce viscosity, and the viscosity-temperature relationship can be approximated by an empirical power law. The fitted second-order kinetic model accurately corresponds to the viscosity at different shear rates and shear times.
Article
Chemistry, Applied
Hyeong Yong Song, Shin Young Park, Sunhyung Kim, Hye Jung Youn, Kyu Hyun
Summary: The linear and nonlinear rheological properties of CNF suspensions were measured under SAOS and LAOS flow, showing distinctions between chemically treated CNFs and untreated fibers in terms of linear viscoelastic properties but reflecting both effects of chemical treatment and mechanical fibrillation in terms of nonlinear viscoelastic properties.
CARBOHYDRATE POLYMERS
(2022)
Article
Biophysics
Barbara Farias, Saad A. Khan
Summary: Water swellable crosslinked polymers, such as lightly-crosslinked hydrophobically modified polyacrylic acid, are commonly used in oil-in-water emulsions for their thickening properties. The rheological behavior of these polymers in emulsions was studied using small strain amplitude and large amplitude oscillatory shear experiments. The friction coefficient in tribology experiments was found to be dependent on the hydrophobicity of the substrate, polymer, and substrate roughness, providing insights for formulating skincare products with efficient lubrication properties.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Mechanics
Matthew Armstrong, Katelyn Rook, Wes Pulles, Michael Deegan, Trevor Corrigan
Summary: Recent research has shown that human blood exhibits the characteristics of a complex material, including shear-thinning, viscoelasticity, a yield stress, and thixotropy. Enhancing the viscoelasticity in TEVP modeling has improved prediction accuracy for human blood rheological data, leading to advancements in estimating the viscoelastic time scale.
Article
Construction & Building Technology
Luiza R. M. de Miranda, Flavio H. Marchesini, Karel Lesage, Geert De Schutter
Summary: This research uses a recently proposed constitutive model to describe the evolution of the time-dependent rheological behavior of a cement system employed in 3D concrete printing. The model takes into account both reversible and irreversible effects and is validated using experimental data. Compared to other models in the literature, this work establishes a stronger connection with real experimental quantities, providing supporting evidence for the model.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Mechanics
Futianyi Wang, Ronald G. Larson
Summary: By proposing a simple thixotropic constitutive model, the complex rheology and shear-rate inhomogeneities of lamellar gel networks have been successfully predicted. The model captures important features observed in experiments, such as thixotropic shear thinning, slow creep under small shear stress, fast creep at higher stress, partial recovery of strain upon stress removal, and the unique shear-banding phenomenon.
JOURNAL OF RHEOLOGY
(2023)
Article
Computer Science, Software Engineering
Giorgio Luciano, Serena Berretta, Kristian Hovde Liland, Gavin J. Donley, Simon A. Rogers
Summary: Specialized software like oreo has been developed to analyze rheological data from large amplitude oscillatory shear tests, providing researchers with a reproducible workflow in the R environment. The software allows for the analysis of both linear and nonlinear deformation regimes using the Sequence of Physical Processes (SPP) framework.
Article
Mechanics
Andre Pincot, F. John Burpo, Elahe Javadi, Safa Jamali, Sean Farrington, Matthew J. Armstrong
Summary: A distinctive stress hysteresis phenomenon is observed in human blood rheology, which is related to the longer characteristic time of shear-induced rouleaux breakdown. The hysteresis data is used to fit parameters of the t-ESSTV model, which can predict various blood flow characteristics under different conditions. The correlation between fitting parameters and physiological data helps interpret the model behavior in physical terms.
Article
Chemistry, Applied
Subhanki Padhi, Ashutosh Singh, Winny Routray
Summary: In this study, cellulose was successfully isolated from jackfruit peel through alkaline and bleaching treatments, resulting in a cellulose yield of 25.6%. The presence of cellulose in the extracted product was confirmed by IR spectroscopy. The microstructure of cellulose fibrils and their elemental composition were analyzed using SEM images and EDX spectra. Rheological properties of cellulose suspensions, such as flow properties and viscoelastic characteristics, were investigated under different pH, ionic strength, and cellulose concentration conditions.
FOOD HYDROCOLLOIDS
(2023)
Article
Mechanics
S. J. Coombs, M. A. Kanso, K. El Haddad, A. J. Giacomin
Summary: The complex viscosity of planar star-branched polymers was derived from general rigid bead-rod theory, with the analysis revealing that a slightly irregular center-beaded tetrahedron is required to describe the behavior of quadrafunctional polybutadiene.
Article
Energy & Fuels
Ali Ettehadi, Ceylan Ulker, Gursat Altun
Summary: The study on the rheology of sepiolite and bentonite drilling fluids found that they exhibit different performance at different temperatures, with bentonite performing better at low temperatures and sepiolite outperforming at high temperatures. Additionally, both fluid systems demonstrated shear rate thickening behavior at low to moderate strain rates, contrary to common knowledge.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Alan I. Nakatani, Sipei Zhang, Sehban Ozair, Asghar Peera, Wenshiue O. Young, Kylie M. Kennedy, Charles Peterson, Cachae Pearson, Himal Ray
Summary: Research suggests that large amplitude oscillatory shear (LAOS) experiments may be more indicative of applications test results for pressure sensitive adhesives. Parameters G'M, Q, and e3/e1 show strong correlation with peel strength and shear strength, while parameters S, T, and v3/v1 exhibit weaker dependencies.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2021)
Article
Polymer Science
Tian Liang, Avraam I. Isayev, Jing Zhong
Summary: LAOS studies were conducted on untreated and ultrasonically treated ESO/nanoclay 30B colloids, and the results showed that increasing ultrasonic amplitude improved the dispersion of nanoclay. Lower screw rotation speed also enhanced dispersion for untreated colloid, while higher ultrasonic amplitudes required lower screw speed for better dispersion. Parameters S and T revealed significant differences in strain hardening/softening and shear thickening/thinning behaviors between untreated colloid and treated colloids.
Article
Materials Science, Multidisciplinary
Huixing Wang, Tianxiao Chang, Yancheng Li, Shaoqi Li, Guang Zhang, Jiong Wang
Summary: This article investigates the influence of frequency on the field-dependent non-linear rheology of magnetorheological grease under large amplitude oscillatory shear. The results show that the onset of non-linear behavior of MR grease is frequency-dependent under different magnetic fields, but the non-linear rheology is not significantly affected by the oscillatory frequency when the shear strain amplitude increases.
FRONTIERS IN MATERIALS
(2021)
Article
Multidisciplinary Sciences
Mohammadamin Mahmoudabadbozchelou, Safa Jamali
Summary: Researchers have developed Rheology-Informed Neural Networks (RhINNs) to accurately predict the fully resolved solution of constitutive equations for complex fluids under various flow protocols. RhINNs can learn non-trivial model parameters for complex materials using a single flow protocol, enabling accurate modeling with limited experiments. RhINNs are not limited to a specific model and can be extended to recover complex manifestations of kinematic heterogeneities and transient shear banding of thixotropic fluids.
SCIENTIFIC REPORTS
(2021)
Article
Mechanics
Chen Liu, Jianzhong Lin, Zhenyu Ouyang
Summary: This study simulated the locomotion state and motion type of elliptical squirmers in a channel flow of power-law fluids. The influence of different parameters on the squirmers was explored, and it was found that coupled structures are prone to break and viscosity significantly affects the flow velocity and motion type of squirmers.
Article
Mechanics
E. E. Herrera-Valencia, M. L. Sanchez-Villavicencio, C. Soriano-Correa, O. Bautista, L. A. Ramirez-Torres, V. J. Hernandez-Abad, F. Calderas
Summary: This study investigated the electroosmotic flow of a viscoelastic fluid in a capillary system. The rheology of the fluid was characterized by a novel generalized exponential model equation, and the effect of charge density on the double-layer field and electrical forces was analyzed. Mathematical models were used to describe the rheological properties and flow performance of the fluid, and experimental data were used to make predictions. The study also examined the influence of applied forces on the structure of the fluid.
Article
Mechanics
Stefano Amadori, Giuseppe Catania
Summary: This article presents a multi-step, iterative technique for locally non-parametric identification of the standard linear solid (SLS) material model using fractional order time differential operators. Test input data consists of a set of identified material complex modulus values estimated at different frequency values obtained from input-output experimental measurements and quasi-static relaxation measurements on the same specimen. The proposed technique is based on an algebraic procedure to solve an overdetermined system of linear equations in order to obtain optimal values for the unknown parameters of the model. The procedure is non-parametric, as the order of the SLS model is initially unknown.
