Article
Mathematics, Applied
Zujin Zhang, Sinan Wang
Summary: By estimating the nonlinear term in an innovative way, the optimal regularity criterion for shear thinning fluids can be obtained via the velocity field.
APPLIED MATHEMATICS LETTERS
(2021)
Article
Engineering, Environmental
Zhongdong Wang, Xingyu Xiang, Hongwei Zhu, Yanpeng Dong, Chunying Zhu, Youguang Ma, Bing Sun, Stanislav A. Patlazhan, Taotao Fu
Summary: The study focuses on shear-thinning non-Newtonian fluids in T-junction parallelized microchannels, providing valuable insights into the emulsification process and droplet generation synchronicity. Silicone oil is used as the continuous phase, while sodium carboxymethyl cellulose (CMC) aqueous solutions are used as the dispersed phase. The study investigates the effects of two-phase flow rates and rheological characteristics on the droplet generation stages, and also explores the coupling of interface evolution between parallelized microchannels, highlighting the periodic changes between synchronous and asynchronous droplet generation types and their impact on droplet monodispersity.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Mathematics, Applied
Hugo Beirao da Veiga, Jiaqi Yang
Summary: The study focuses on the partial regularity of suitable weak solutions to incompressible non-Newtonian fluids in the shear-thinning case p < 2, revealing that singular points are concentrated on a closed set with zero one-dimensional Hausdorff measure.
Article
Mechanics
Dmitrii E. Roshchin, Stanislav A. Patlazhan
Summary: The effect of external fluid on the mixing efficiency of miscible Newtonian liquids inside a two-dimensional microdroplet in a rectilinear microchannel is investigated. It is found that the mixing time is a power-law function of Peclet number and is determined by the rheological properties of the fluid. Additionally, three distinct liquid mixing mechanisms inside the microdroplet at different confinement parameter values are revealed.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Physics, Multidisciplinary
Yang Gang, Zheng Ting, Cheng Qi-Hao, Zhang Hui-Chen
Summary: This study investigates the configuration evolution and viscosity changes of sodium carboxymethyl cellulose solution under different shear rates through molecular dynamics simulation, with a focus on the impact of hydrogen bonding on solution viscosity. The results show that as the shear rate increases, the shear thinning effect of the solution becomes more significant.
ACTA PHYSICA SINICA
(2021)
Article
Mechanics
Yue Li, Jinlei Mu, Chengwang Xiong, Zizheng Sun, Caiyun Jin
Summary: This study examines the influence of rheological parameters on the properties of fresh cement mortar fluid through different curvatures of a pipe bend. The results show that sharper curvatures and higher power-law indexes can reduce the asymmetric unyielded zone, while increased yielding stress and power-law index lead to greater total pressure drop and additional pressure loss.
Article
Mechanics
Qi Chen, Jingkun Li, Yu Song, Bin Chen, David M. Christopher, Xuefang Li
Summary: Pressure-driven microdroplet formation was experimentally investigated using glass flow-focusing devices, showing the effects of factors and self-similarities in dispersed thread formation.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Energy & Fuels
Maduranga Amaratunga, Herimonja A. Rabenjafimanantsoa, Rune W. Time
Summary: An experimental study was conducted to observe the effect of vertical fluid oscillations on the settling velocity of glass particles, revealing that oscillatory flow reduces the settling velocity in shear-thinning fluids. Additionally, particles released near the pipe wall experienced slower settling velocities regardless of the fluid rheology.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Polymer Science
Ranajay Datta, Leonid Yelash, Friederike Schmid, Florian Kummer, Martin Oberlack, Maria Lukacova-Medvid'ova, Peter Virnau
Summary: This study investigates the molecular origin of shear-thinning in melts of oligomers by coarse-grained simulations of sheared melts. It finds that the increase and decrease of entanglements with increasing chain stiffness is the major cause for the non-monotonic behavior of viscosity, and at higher shear rates, chains align and disentangle contributing to shear-thinning. The study confirms the influence of microscopic details in the molecular structure of short polymers on macroscopic polymer flows.
Article
Physics, Fluids & Plasmas
Nayeon Park, Jaewook Nam
Summary: This paper presents an in-depth analysis of pulsatile shear-thinning flows in two-dimensional channels by introducing the non-Newtonian Womersley number. It is found that the shape of the master curve is determined by the shear thinning degree, and the competition between viscous and pulsatile time scales can be appropriately described by this number.
PHYSICAL REVIEW FLUIDS
(2022)
Article
Thermodynamics
Dana Fadlalla, Joshua Rosettani, Shahriyar Ghazanfari Holagh, Wael H. Ahmed
Summary: In this study, the operational performance of airlift pumps handling shear-thinning non-Newtonian fluids is experimentally investigated. The results show that, as liquid viscosity increases, both delivered liquid flow rate and pumping efficiency decrease significantly. However, the optimum performance points of the pump occur at similar air flow rates regardless of the increase in liquid viscosity. Liquid viscosity also affects the void fraction distribution and the transition from slug flow to churn flow.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2023)
Article
Engineering, Chemical
Xiyang Liu, Ziwei Liu, Shaokun Jiang, Chunying Zhu, Youguang Ma, Taotao Fu
Summary: This experimental study investigates the formation mechanism of droplets of shear-thinning non-Newtonian fluids in a step-emulsification microdevice, finding that the addition of CMC increases the droplet size. A droplet volume prediction model considering non-Newtonian characteristics is proposed.
Article
Engineering, Chemical
Vipin Michael, Mick Dawson, Robert Prosser, Adam Kowalski
Summary: The study investigated the viscoelastic pressure drop enhancement in real process fluids using experimental methods and computer simulations with a SMX+(TM) mixer. Comparisons were made against classical friction factor correlations for non-elastic fluids and literature correlations for elastic fluids. CFD predictions for pressure losses were consistent with measurements.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Engineering, Civil
Nickolas Martin Brown, Morteza Dejam
Summary: This study mathematically derived and studied the tracer dispersion in hydraulic fractures with different geometries and porous walls for non-Newtonian fluid flows. The study found that the coefficient of the shear dispersion term follows a certain order for different geometrical models and flow behaviors. The study also emphasized the importance of considering the communication between hydraulic fractures and the rock matrix for determination of tracer dispersion. The findings of this study can pave the way for future investigations on tracer dispersion in hydraulic fractures with rough and porous walls.
JOURNAL OF HYDROLOGY
(2023)
Article
Chemistry, Analytical
Abdelkader Mahammedi, Naas Toufik Tayeb, Kwang-Yong Kim, Shakhawat Hossain
Summary: A numerical investigation was conducted to analyze the mixing behaviors of non-Newtonian shear-thinning fluids in Kenics micromixers. The study showed that micro-Kenics exhibit high mixing performances under a wide range of Reynolds numbers.
Article
Chemistry, Physical
Philippe Agaciak, Samir Yahiaoui, Madeleine Djabourov, Thierry Lasuye
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2015)
Article
Chemistry, Physical
Philippe Agaciak, Samir Yahiaoui, Madeleine Djabourov, Thierry Lasuye
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2015)
Article
Biophysics
Benedicte Pradines, Madeleine Djabourov, Christine Vauthier, Philippe M. Loiseau, Gilles Ponchel, Kawthar Bouchemal
COLLOIDS AND SURFACES B-BIOINTERFACES
(2015)
Article
Chemistry, Physical
Erika Specogna, King Wo Li, Madeleine Djabourov, Florent Carn, Kawthar Bouchemal
JOURNAL OF PHYSICAL CHEMISTRY B
(2015)
Article
Chemistry, Applied
Aurelia Galus, Jean-Maurice Mallet, David Lembo, Valeria Cagno, Madeleine Djabourov, Hugues Lortat-Jacob, Kawthar Bouchemal
CARBOHYDRATE POLYMERS
(2016)
Article
Chemistry, Applied
German Ayala Valencia, Madeleine Djabourov, Paulo Jose do Amaral Sobral
CARBOHYDRATE POLYMERS
(2016)
Article
Chemistry, Physical
Raul Diaz-Salmeron, Ismail Chaab, Florent Carn, Madeleine Djabourov, Kawthar Bouchemal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2016)
Article
Chemistry, Physical
Florent Carn, Sophie Nowak, Ismail Chaab, Raul Diaz-Salmeron, Madeleine Djabourov, Kawthar Bouchemal
JOURNAL OF PHYSICAL CHEMISTRY B
(2018)
Article
Pharmacology & Pharmacy
Min Zhang, Madeleine Djabourov, Claudie Bourgaux, Kawthar Bouchemal
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2013)
Article
Polymer Science
Mara Coppola, Madeleine Djabourov, Maria Ferrand
Article
Chemistry, Physical
G. A. Valencia, M. Djabourov, F. Carn, P. J. A. Sobral
COLLOID AND INTERFACE SCIENCE COMMUNICATIONS
(2018)
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.