Relevant bibliographies by topics / Dynamic shear rheology

Academic literature on the topic 'Dynamic shear rheology'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Dynamic shear rheology.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Dynamic shear rheology"

1

Nakayama, Yasuya, Kiyoyasu Kataoka, and Toshihisa Kajiwara. "Dynamic Shear Responses of Polymer-polymer Interfaces." Nihon Reoroji Gakkaishi 40, no. 5 (2013): 245–52. http://dx.doi.org/10.1678/rheology.40.245.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lade, Rohit, Kailas Wasewar, Rekha Sangtyani, Arvind Kumar, Diwakar Shende, and Dilip Peshwe. "Dynamic shear rheology of nanocomposite propellant suspension." Emerging Materials Research 8, no. 2 (June 2019): 258–64. http://dx.doi.org/10.1680/jemmr.18.00011.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Kulmyrzaev, Asylbek, and David Julian McClements. "High frequency dynamic shear rheology of honey." Journal of Food Engineering 45, no. 4 (September 2000): 219–24. http://dx.doi.org/10.1016/s0260-8774(00)00062-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Li, Wei Hua, and Xian Zhou Zhang. "Rheology of Magnetorheological Shear Thickening Fluids." Advanced Materials Research 32 (February 2008): 161–64. http://dx.doi.org/10.4028/www.scientific.net/amr.32.161.

Full text
Abstract:
This paper presents fabrication and characterizing of a new functional material, magnetorheological shear thickening fluid (MRSTF), by mixing micron-sized magnetizable particles with nano-sized silica particle based shear thickening fluid. Dynamic properties of the MRSTF were characterized by using a parallel-plate rheometer. The effects of steady-state shear rate and magnetic field on MRSTF rheological properties were addressed. The suspension shows an abrupt increase in complex viscosity beyond a critical dynamic shear rate and a magnetic field controllable characteristic, as well as reversible.
APA, Harvard, Vancouver, ISO, and other styles
5

Triantafillopoulos, Nick, Bruce Schreiner, James Vaughn, and Douglas Bousfield. "Latex Carpet Compound Rheology." Applied Rheology 18, no. 6 (December 1, 2008): 64250–1. http://dx.doi.org/10.1515/arh-2008-0023.

Full text
Abstract:
Abstract This is a study of three-phase foam rheology to qualify penetration in to backing webs during frothed carpet compounds applications. Transient viscosity as a function of shear rate under a short time period is proposed to characterize flow of these compounds in response to a rapidly changing shear field during their application. We developed a fluid dynamic model that predicts the shear and pressure distributions in the compound during its processing in a metering nip based on process parameters and rheological results. We tested frothed compound formulations that are empirically known to be “penetrating” and “non-penetrating” based on the choice of soap (frothing surfactant). Formulated at the same froth density, penetrating to carpet backing compounds had large froth bubbles, relatively low transient shear viscosity and showed increasing foam breakdown due to shear when compared to non-penetrating compounds. Such frothed compounds readily collapse under shear and have relatively low dynamic stability, so the transition from a three-phased (air/aqueous/solid) to a two-phased (water/solid) system occurs much easier and faster during application. The model predicts the shear rate development and a small difference in the pressure distributions in the applicator nip between these formulations, but reduction in drainage for the non-penetrating formulation.
APA, Harvard, Vancouver, ISO, and other styles
6

Prabhu, Tekkati Ajeeth, and Anugrah Singh. "Rheology and microstructure of discontinuous shear thickening suspensions." Journal of Rheology 66, no. 4 (July 2022): 731–47. http://dx.doi.org/10.1122/8.0000317.

Full text
Abstract:
We report experimental studies on rheology and microstructure in discontinuous shear thickening of fumed silica suspensions. Formation of particle clusters was observed after the critical shear rate, and their size increases during shear thickening. At higher shear rates, these clusters were found to break down due to strong shear forces, and a continuous decrease in viscosity was observed. The suspension viscosity and the first normal stress difference variation with the shear rate showed similar dependence. The sign of first normal stress difference was negative during shear thickening, which is consistent with the hydrodynamic model of cluster formation. A linear variation of the first normal stress difference with shear rate during shear thickening further indicates its predominant hydrodynamic origin and supports the recent Stokesian dynamics simulation studies on discontinuous shear thickening based on the hydrodynamic model of nonsmooth colloids by Wang et al. [J. Rheol. 64, 379–394 (2020)]. On the other hand, a nonlinear decrease in the first normal stress difference with shear rate in the second shear-thinning region is primarily due to breaking of large clusters into smaller ones and with a possibility of frictional contacts within these hydroclusters. The oscillatory shear measurements were also performed and the samples displayed strain thickening similar to shear thickening. The similarity between the steady and dynamic shear rheology at high strain amplitudes was observed using the modified Cox–Merz rule.
APA, Harvard, Vancouver, ISO, and other styles
7

BAGCHI, PROSENJIT, and R. MURTHY KALLURI. "Dynamic rheology of a dilute suspension of elastic capsules: effect of capsule tank-treading, swinging and tumbling." Journal of Fluid Mechanics 669 (January 13, 2011): 498–526. http://dx.doi.org/10.1017/s0022112010005161.

Full text
Abstract:
Three-dimensional numerical simulations are used to study the effect of unsteady swinging and tumbling motion on the rheology of a dilute suspension of oblate-shaped elastic capsules. Unlike a suspension of initially spherical capsules undergoing the steady tank-treading motion for which the rheology is constant in time, the suspension of non-spherical capsules is time-dependent due to the unsteady capsule motion. In a simple shear flow, the non-spherical capsules undergo a transition from the tank-treading/swinging to the tumbling motion with a reduction in the shear rate or an increase in the ratio of the internal to external fluid viscosities. We find that the time-averaged rheology obtained for the non-spherical capsules undergoing the unsteady motion is qualitatively similar to that obtained for the spherical capsules undergoing the steady tank-treading motion, and that the tank-treading-to-tumbling transition has only a marginal effect. The time-averaged rheology exhibits a shear viscosity minimum when the capsules are in a swinging motion at high shear rates but not at low shear rates. This is a remarkable departure from the behaviour of a vesicle suspension which exhibits a shear viscosity minimum at the point of transition. We find that the shear viscosity in a capsule suspension can decrease as well as increase with increasing viscosity ratio during both tank-treading and tumbling motions, while that of a vesicle suspension always decreases in tank-treading motion and increases in tumbling motion. We then seek to connect the time-dependent rheology with the time-dependent membrane tension, capsule orientation, deformation and tank-treading velocity. At low shear rates, the numerical results exhibit a similar trend to that predicted by analytical theory for rigid ellipsoids undergoing tumbling motion. The trend differs during swinging motion due to the periodic deformation and time-dependent variation of the membrane stress. The elastic component of the shear stress is minimum when the capsules are maximally compressed, and is maximum when the capsules are maximally elongated. In contrast, the viscous component is related to the periodic variation of the tank-treading velocity synchronized with the swinging motion, and the rate of capsule elongation or compression. The swinging or tumbling velocity makes no contribution to the time-dependent rheology.
APA, Harvard, Vancouver, ISO, and other styles
8

Pyromali, Christina, Yanzhao Li, Flanco Zhuge, Charles-André Fustin, Evelyne van Ruymbeke, and Dimitris Vlassopoulos. "Nonlinear shear rheology of single and double dynamics metal-ligand networks." Journal of Rheology 66, no. 6 (November 1, 2022): 1223–35. http://dx.doi.org/10.1122/8.0000429.

Full text
Abstract:
We present a systematic experimental study of the shear rheology of metallosupramolecular assemblies based on entangled telechelic star polymers comprising one (single dynamic network) or two (double dynamics network) types of physical bonds with the aim to unravel the role of concentration and strength of these bonds on the nonlinear response. Model dynamic networks functionalized with terpyridine ligands were formed by adding different metal ions with increasing bonding strength, zinc, copper, and cobalt. The dynamics are driven by entanglement/disentanglement processes and a ligand exchange mechanism. Steady-state viscosities of single and double dynamics networks collapse onto a universal curve over a wide range of Weissenberg numbers based on terminal time (up to about 300 for single and 1000 for double), exhibiting stronger shear thinning (with an exponent of −0.76) compared to entangled neutral star polymers. Double dynamics networks consisting of two different metal ions (with different lifetimes) exhibit stronger mechanical coherence (rate-dependent fractional viscosity overshoot) and accumulate larger strain at steady-state flow compared to single-ion counterparts. The shear stress growth function signals exhibit weak, albeit unambiguous shear strain hardening, which becomes more pronounced for stronger associations. They also exhibit double overshoot, which reflects the interplay of association strength and chain deformation. Increasing the strength of associations leads to the failure of the Cox–Merz rule, which is more severe for single dynamic networks. The markedly different behavior of double dynamics networks is attributed to the fact that at sufficiently high ion content, the weaker bond acts as a sacrificial component, which provides local energy dissipation and enhances the overall deformability. This bears analogies with their linear viscoelastic response, which has revealed that the arm disentanglement (delayed due to the reversible bonds) effectively interpolates between the two single dynamic network components, depending on composition. Our results suggest ways to tailor the mechanical properties of this class of materials by judicious choice of the type and content of the ion.
APA, Harvard, Vancouver, ISO, and other styles
9

Aime, S., and L. Cipelletti. "Probing shear-induced rearrangements in Fourier space. I. Dynamic light scattering." Soft Matter 15, no. 2 (2019): 200–212. http://dx.doi.org/10.1039/c8sm01563e.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Aime, S., and L. Cipelletti. "Probing shear-induced rearrangements in Fourier space. II. Differential dynamic microscopy." Soft Matter 15, no. 2 (2019): 213–26. http://dx.doi.org/10.1039/c8sm01564c.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Dynamic shear rheology"

1

Romo-Uribe, Angel. "Main-chain thermotropic liquid crystalline polymers under shear : a dynamic scattering study." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243155.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Pieri, Marco. "Shear deformation of calcite rocks : rheology and microfabric evolution of Carrara marble under dynamic recrystallization during torsion experiments /." Zürich : ETH, 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13220.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Střasáková, Monika. "Stárnutí asfaltových pojiv." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240117.

Full text
Abstract:
The theoretical part of this thesis describes the rheology of bituminous binders, aging of asphalt binders and laboratory methods simulating short and long term aging. The following describes an empirical tests (needle penetration, softening point ring ball method) and functional tests (complex shear modulus and phase angle, dynamic viscosity), which are performed in the dynamic shear rheometer. At the end of this section, laboratory aging of bituminous binders using method RTFOT and method RTFOT + PAV is described in more detail. In the practical part of this thesis, the results of all tests performed on the binders aged using RTFOT + PAV are introduced and compared with results of properties of non-aged binders and binders aged by 3xRTFOT.
APA, Harvard, Vancouver, ISO, and other styles
4

Pěnčík, Michal. "Reologické vlastnosti asfaltových pojiv." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227653.

Full text
Abstract:
The Diploma thesis is focused on rheological properties of bituminous binders and mixtures. Above all, it describes the changes of these properties of samples of bituminous binders and mixtures. Those were brought by the process of laboratory aging, since it simulates the changes occurring in the in the real-life conditions. The theoretical part depicts the field of rheology and methods utilized for simulating the ageing of binders and mixtures. The practical part describes the process of preparation of samples and its testing. Firstly, the ageing of bituminous mixture by the means of BSA method (Braunschweiger Alterung) took place, which was followed by preparing the solids for testing the modulus of stiffness and main testing. The rest of the mixture was used for extracting the binder. Tests with the binder were focused on the usage of dynamic shear rheometer (complex shear modulus, dynamic viscosity). The last part of the work is dedicated to the comparison of the outcomes of testing.
APA, Harvard, Vancouver, ISO, and other styles
5

Tsamados, Michel. "Mechanical response of glassy materials : theory and simulation." Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00466081.

Full text
Abstract:
Il est bien établi que les propriétés mécaniques et rhéologiques d'une large classe de matériaux vitreux amorphes met en jeu - contrairement aux dislocations dans les cristaux - des rearrangements structuraux localisés formant par un processus de cascade des bandes de cisaillements. Cette localisation de la déformation est observée dans divers systèmes vitreux ainsi que dans des simulations numériques. Cette réponse mécanique complexe reste mal comprise à une échelle microscopique et il n'est pas clair si l'écoulement plastique peut être associé à une origine structurale locale ou à des processus purement dynamiques.Dans cette thèse nous envisageons ces problématiques à l'aide de simulations atomiques athermales sur un système Lennard-Jones modèle. Nous calculons le tenseur élastique moyenné localement sur une échelle nanométrique. A cette échelle, le verre est assimilable à un matériau composite comprenant un échafaudage rigide et des zones fragiles. L'étude détaillée de la déformation plastique à différents taux de cisaillement met en évidence divers régimes d'écoulement. En dessous d'un taux de cisaillement critique dépendant de la taille du système, la réponse mécanique atteind une limite quasistatique (effets de taille fini, cascades d'événements plastiques, contrainte seuil) alors que pour des taux de cisaillement plus importants les propriétés rhéologiques sont fixées par le taux de cisaillement imposé. Dans ce régime nous mettons en évidence la croissance d'une longueur de coopérativité dynamique et discutons de sa dépendance avec le taux de cisaillements.
APA, Harvard, Vancouver, ISO, and other styles
6

Ali, Nabil. "RhéoSpeckle : un nouvel outil d’étude du comportement multi-échelle des matériaux hétérogènes." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI013/document.

Full text
Abstract:
Ce travail de thèse cherche à mieux caractériser le comportement des matériaux hétérogènes sous cisaillement avec une approche multi-échelles (macro-méso-microscopique).Cela est rendu possible en développant un montage innovant qui couple un rhéomètre à un système d’imagerie de speckle résolue spatialement et temporellement (RheoSpeckle). Nous montrons la validation de notre expérience en l’appliquant sur deux matériaux parfaits : un solide et un liquide. Sur le solide, on mesure le champ de déplacement sur les images de speckle avec une résolution meilleure que 1 µm. Puis on prouve l’élasticité du matériau à l’échelle microscopique. Sur le liquide, la taille des nanoparticules est déterminée avec un excellent accord avec la spécification du fabriquant. Le champ de vitesse dans l’entrefer du Couette est calculé avec une bonne précision sur un temps inférieur à 1 s et avec une résolution spatiale de 100 µm sur 5mm. La dynamique microscopique d’une solution brownienne est étudiée et l’influence du cisaillement sur la décorrélation est déterminée. Nous montrons les capacités de notre expérience à étudier des matériaux hétérogènes en l’appliquant sur une solution concentrée de micelles géantes. La rhéologie linéaire est étudiée en rhéometrie classique mais aussi en utilisant l’imagerie du speckle. La rhéologie non linéaire de ce matériau est déterminé en rhéometrie (macro) mais aussi en calculant le champ de vitesse et l’intensité des images de speckle (méso) ou on caractérise les bandes de cisaillement qui se forment à partir d’un cisaillement critique. En fin la relaxation spatio-temporelle des bandes de cisaillement (micro) est caractérisée. On observe pour la première fois l’existence de deux temps de relaxation après l’arrêt du cisaillement et que la relaxation des bandes est relativement lente
This work tries to better characterize the behavior of homogeneous and heterogeneous materials under shear with a multi-scale approach (macro-meso-micro-scopic). To do that, we have developed an innovative setup by coupling a rheometer to a speckle imaging geometry witch is spatially and temporally resolved (RheoSpeckle). We validate our experience using two perfect materials: a solid and a pure viscous fluid. On a solid sample, we calculate the displacement field on the speckle images with a resolution better than 1 µm. we demonstrate than, the microscopic elasticity of this material. On a pure viscous fluid, we measured the nanoparticle’s size with excellent accuracy. When a constant shear rate is applied, the velocity profile is measured with a time less than 1 s with a spatial resolution of 100 µm over 5 mm. The microscopic dynamic of a Brownian solution under shear is probed and the shear induced on the decorrelation of the intensity correlation function is studied. We show the capabilities of our experience using a concentrated solution of wormlike micelles. The linear rheology is studied using rheometric measurements and our speckle imaging system. Nonlinear rheology is studied using rheometric measurements (macro), but also by calculating the velocity filed and the intensity of speckle images (meso). With mesocopics measurements, the formation of shear banding is proved and characterized. Finally, the spatio-temporal relaxation (micro) of shear bands of this material is studied. We show for the first time the existence of two relaxations times after shear and that the relaxation of bands is relatively slow
APA, Harvard, Vancouver, ISO, and other styles
7

Isreb, Mohammad. "Thermal and rheological approaches for the systematic enhancement of pharmaceutical polymeric coating formulations : effects of additives on glass transition temperature, dynamic mechanical properties and coating performance in aqueous and solvent-free coating process using DSC, shear rheometry, dissolution, light profilometry and dynamic mechanical analysis." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5527.

Full text
Abstract:
Additives, incorporated in film coating formulations, and their process parameters are generally selected using a trial-and-error approach. However, coating problems and defects, especially those associated with aqueous coating systems, indicate the necessity of embracing a quality-by-design approach to identify the optimum coating parameters. In this study, the feasibility of using thermal and rheological measurements to help evaluate and design novel coating formulations has been investigated. Hydroxypropyl methylcellulose acetate succinate (HPMCAS), an enteric coating polymer, was used as the film forming polymer. Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), and Parallel Plate Shear Rheometery (PPSR) were used to evaluate the effect of different plasticisers on the performance of HPMCAS. The results illustrate that, for identical formulations, the DSC and DMA methods yielded up to 40% differences in glass transition temperature (Tg) values. Moreover, Tg measured using loss modulus signals were always 20-30 oC less than those measured using tan delta results in DMA testing. Absolute and relative Tg values can significantly vary depending on the geometry of the samples, clamp size, temperature ramping rate and the frequency of the oscillations. Complex viscosity data for different formulations demonstrated a variable shear thinning behaviour and a Tg independent ranking. It is, therefore, insufficient to rely purely on Tg values to determine the relative performance of additives. In addition, complex viscosity results, obtained using both the DMA and PPSR techniques at similar temperatures, are shown to be comparable. The results from both techniques were therefore used to produce continuous master curves for the HPMCAS formulations. Additionally, step strain tests showed that HPMCAS chains do not fully III disentangle after 105 seconds as predicted by the Maxwell model. Finally, in situ aqueous-based coating experiments proved that mixtures of triethyl acetyl citrate and acetylated monoglyceride (TEAC/AMG), even without cooling of the suspension, do not cause blocking of the spray nozzle whereas triethyl citrate (TEC) based formulae did. TEAC (alone or in a combination with AMG) exhibits superior wettability to HPMCAS than TEC/AMG formulations and can be used to enhance the efficiency and film quality of the dry coating process.
APA, Harvard, Vancouver, ISO, and other styles
8

Ali, Mahdi. "Study of the bitumen aging effects on the rheological properties and fatigue behavior." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/16255/.

Full text
Abstract:
A study of bitumen aging effects on the rheological properties and fatigue behavior is carried out on five polymer modified bitumen provided by an oil company. Dynamic Shear Rheometer (DSR), is used to perform advanced experimental investigation. It allows practicing frequency sweep tests, fatigue tests and time sweep tests. Polymer modified bitumen with different percentage of SBS with or without the presence of crumb rubber are tested before and after short and long aging processes. Master curves were generated based on frequency sweep tests data, they are studied, and a comparison was conducted between each bitumen before and after aging. In this thesis, the DSR is presented, as well as the testing procedure and the tested materials. A fatigue life analysis of the results, based on the use of two different criteria, the first criterion is classically used: it consists in defining the failure as a 50% loss of the initial stiffness. The other criteria based on dissipated energy data. This thesis provides results which show the effects of several factors on fatigue and healing response such as bitumen type, ageing, the presence of rubber and polymer modification.
APA, Harvard, Vancouver, ISO, and other styles
9

Bos�ko, Jaroslaw Tomasz, and jbosko@unimelb edu au. "Molecular simulation of dendrimers under shear." Swinburne University of Technology. Centre for Molecular Simulation, 2005. http://adt.lib.swin.edu.au./public/adt-VSWT20050804.141034.

Full text
Abstract:
In this work flow properties of dendrimers are studied with the aid of molecular simulations. For the first time the results of the nonequilibrium molecular dynamics simulations of the dendrimers in the melt are reported. Molecules are modelled at the coarse-grained level using the bead-spring model. The objective of this research is to analyse the influence of the molecular topology in the macroscopic flow behaviour of the melts. Systems of dendrimers of generations 1 to 4 undergoing planar shear are compared to the melts composed of linear chain polymers. The internal structure and shape of dendrimers is extensively analysed. The response of the molecules to the shearing in the form of stretching and alignment is studied. The correlation between the onset of shear thinning and the onset of deformation of molecules is observed. The changes in the fractal dimensionality of dendrimers due to shearing are also analysed. Dendrimers, due to their highly branched structure and compact globular conformations in the melt, are found to behave differently when sheared, compared to traditional linear polymers. Unlike linear polymers, they do not undergo transition form the Rouse to the reptation regimes. This effect is explained in terms of the suppressed entanglement between molecules. Moreover, dendrimers when compared to linear chain systems exhibit lower Newtonian viscosity, onset of the shear thinning at higher strain rates, and less pronounced shear thinning in the non-Newtonian regime. They can be used as rheology modifiers, as it is shown in the preliminary results obtained from the simulations of the dendrimers-linear polymer blends. In agreement with other theoretical and experimental studies, dendrimers in the melt are found to have compact space-filling structure with terminal groups distributed throughout the interior of the molecule. Suggestions for the further study of dendrimers via molecular simulations are made.
APA, Harvard, Vancouver, ISO, and other styles
10

Madraki, Fatemeh. "Shear Thickening in Non-Brownian Suspensions." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1584354185678102.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Dynamic shear rheology"

1

Furst, Eric M., and Todd M. Squires. Microrheology. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199655205.001.0001.

Full text
Abstract:
We present a comprehensive overview of microrheology, emphasizing the underlying theory, practical aspects of its implementation, and current applications to rheological studies in academic and industrial laboratories. Key methods and techniques are examined, including important considerations to be made with respect to the materials most amenable to microrheological characterization and pitfalls to avoid in measurements and analysis. The fundamental principles of all microrheology experiments are presented, including the nature of colloidal probes and their movement in fluids, soft solids, and viscoelastic materials. Microrheology is divided into two general areas, depending on whether the probe is driven into motion by thermal forces (passive), or by an external force (active). We present the theory and practice of passive microrheology, including an in-depth examination of the Generalized Stokes-Einstein Relation (GSER). We carefully treat the assumptions that must be made for these techniques to work, and what happens when the underlying assumptions are violated. Experimental methods covered in detail include particle tracking microrheology, tracer particle microrheology using dynamic light scattering and diffusing wave spectroscopy, and laser tracking microrheology. Second, we discuss the theory and practice of active microrheology, focusing specifically on the potential and limitations of extending microrheology to measurements of non-linear rheological properties, like yielding and shear-thinning. Practical aspects of magnetic and optical tweezer measurements are preseted. Finally, we highlight important applications of microrheology, including measurements of gelation, degradation, high-throughput rheology, protein solution viscosities, and polymer dynamics.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Dynamic shear rheology"

1

van den Ende, D., F. Ganzevles, J. Mellema, and C. Blom. "Torsion Pendulum for Measuring the Dynamic Moduli in a Steady Shear Flow." In Third European Rheology Conference and Golden Jubilee Meeting of the British Society of Rheology, 150–52. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0781-2_56.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

van der Veer, J. M., J. H. J. van Opheusden, and R. J. J. Jongschaap. "Brownian Dynamics Simulation of Shear Thinning and Shear Induced Ordering in a Colloidal Suspension." In Third European Rheology Conference and Golden Jubilee Meeting of the British Society of Rheology, 489–91. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0781-2_166.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Davris, Theodoros, Alexey V. Lyulin, Arlette R. C. Baljon, Victor M. Nazarychev, Igor V. Volgin, Sergey V. Larin, and Sergey V. Lyulin. "Linear Viscoelasticity of Polymers and Polymer Nanocomposites: Molecular-Dynamics Large Amplitude Oscillatory Shear and Probe Rheology Simulations." In Advances in Dielectrics, 375–404. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72706-6_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

GUO, Y., T. JANKOWSKI, P. PRADIPASENA, C. K. RHA, J. BURNS, and L. YU. "STEADY AND DYNAMIC SHEAR CHARACTERISTICS OF SODIUM HYALURONATE SOLUTIONS." In Theoretical and Applied Rheology, 505. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89007-8.50216-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

"The use of the shear vane to measure the gel strength and dynamic yield strength of oilwell cement slurries at high." In Rheology of Fresh Cement and Concrete, 147–56. CRC Press, 1990. http://dx.doi.org/10.1201/9781482288889-23.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Shinbrot, Troy. "Rheology in Complex Fluids 1." In Biomedical Fluid Dynamics, 212–47. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198812586.003.0009.

Full text
Abstract:
Complex flows are described, including shear thinning, shear thickening, and yield-stress. Mechanisms of changing viscosity in dense suspensions are explored, including the relevance of the lubrication approximation, dilatency, and the spaghetti model of polymers. Liquid crystal alignment is discussed, and model equations are introduced for flows in packed beds. The viscosity of synovial fluid is described, and equations to combine viscous and elastic behaviors are obtained.
APA, Harvard, Vancouver, ISO, and other styles
7

Shinbrot, Troy. "Rheology in Complex Fluids 2." In Biomedical Fluid Dynamics, 248–66. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198812586.003.0010.

Full text
Abstract:
Blood flow is described, including changes in viscosity in narrow tubes and effects of shear-induced migration. Segregation of particles based on size is considered, and ordering of red blood cells is used as a model for spontaneous ordering in other systems. Unexpected consequences of diffusion are introduced.
APA, Harvard, Vancouver, ISO, and other styles
8

Coussot, Philippe. "Shear rheometry with concentrated suspensions." In Mudflow Rheology and Dynamics, 69–92. Routledge, 2017. http://dx.doi.org/10.1201/9780203746349-4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Xiao, Ping. "Investigation on Modification and Aging Characterization of Stabilized Rubber Powder and SBS Composite Modified Asphalt." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde220897.

Full text
Abstract:
In order to improve the stability and high temperature behavior of rubber asphalt, deep desulfurization stabilized rubber powder and SBS are used to prepare stabilized rubber powder and SBS composite modified asphalt (Hereinafter: composite modified asphalt). In this paper, gel chromatography permeation test, Fourier transform infrared spectroscopy test and dynamic shear rheology test were carried out. Comparative tests were conducted on base asphalt, ordinary rubber asphalt, stabilized rubber powder modified asphalt, SBS modified asphalt and composite modified asphalt. The change mechanism of composite modified asphalt in modification and aging process was studied. The results show that during the preparation of composite modified asphalt, the stabilized rubber powder is fully dissolved and dispersed in the base asphalt after high-speed shearing, and can absorb the light components in the base asphalt, which improves the problem of segregation of rubber asphalt. After adding SBS, SBS and rubber powder will undergo cross-linking reaction to construct a stable polymer network, delaying the degradation of rubber powder and the oxidation of base asphalt in aging process. The anti-aging property of asphalt is improved. During the aging process, both the aging of the base asphalt and the aging of the modifier happen, and both affect the rheological properties of the composite modified asphalt. The comprehensive properties of the composite modified asphalt in each test proves that the composite modified asphalt combines the advantages of stabilized rubber powder modified asphalt and SBS modified asphalt. In addition, it has the advantages of good anti-aging performance, large amount of rubber powder and good economy, and has a promising application prospect.
APA, Harvard, Vancouver, ISO, and other styles
10

KOOPMANS, R. J., and D. PORTER. "PREDICTING THE DYNAMICS OF EXTRUDATE SWELL FROM SHEAR VISCOSITY EXPERIMENTS." In Theoretical and Applied Rheology, 372–73. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89007-8.50149-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Dynamic shear rheology"

1

Eberle, Aaron P. R., Gregorio Velez, Donald Baird, Peter Wapperom, Kevin Ortman, Albert Co, Gary L. Leal, Ralph H. Colby, and A. Jeffrey Giacomin. "The Dynamic Behavior of a Concentrated Non-Brownian Glass Fiber Suspension in Simple Shear Flow." In THE XV INTERNATIONAL CONGRESS ON RHEOLOGY: The Society of Rheology 80th Annual Meeting. AIP, 2008. http://dx.doi.org/10.1063/1.2964823.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Tonmukayakul, N., J. E. Bryant, M. S. Talbot, J. F. Morris, Albert Co, Gary L. Leal, Ralph H. Colby, and A. Jeffrey Giacomin. "Dynamic and Steady Shear Properties of Reversibly Cross-Linked Guar Solutions and Their Effects on Particle Settling Behavior." In THE XV INTERNATIONAL CONGRESS ON RHEOLOGY: The Society of Rheology 80th Annual Meeting. AIP, 2008. http://dx.doi.org/10.1063/1.2964849.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ashrafi, Nariman. "Rheology of Selected Honeys." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10583.

Full text
Abstract:
In this study, rheological properties of five honey samples (Acacia, Citrus Blossom, Fynbos, Bluegum and Raw) were measured. Steady shear and dynamic rheological tests confirmed almost Newtonian behavior for all samples examined over the temperature range of 0–60° C. The water contents of honeys were between 15% and 23%. Fitting of the data in the temperature experiment, showed that primarily expected Arrhenius model is not the best model. Excluding the Raw honey that was possible to be fitted to the said model, the other honey samples were best fitted to a Hyperbolic Tangent model. For the fitted Raw honey however, the activation energy was evaluated to be 95783 J/kg mole. While some rather exceptional viscoelastic properties were observed for the samples, the thixotropic effects were virtually nonexistent. These findings can provide insight into the microstructural, physiological and sensory changes. Also, the study completes a series of studies on rheology of honeys conducted worldwide.
APA, Harvard, Vancouver, ISO, and other styles
4

Belayneh, Mesfin, Bernt S. Aadnøy, and Sharman Thomas. "Dynamic and Static Sagging Characterization and Performances of Four Oil Based Muds." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54457.

Full text
Abstract:
This paper presents the barite sagging phenomenon of four OBM systems having the same density, but different rheology properties. The investigations of barite sagging is based on dynamic sagging and viscoelasticity testing. The viscoelastic properties related to gel formation of the drilling fluids were investigated under amplitude and frequency sweeps. The study also tries to correlate the results obtained from dynamic sag with the dynamic viscoelastic properties of the drilling fluid and standard API rheology parameters. The results show that as the oil water ratio increases the drilling fluid rheology parameters such as lower shear yield stress (LSYS), yield stress (YS) and plastic viscosity (PV) parameters also increases. In addition, the viscoelastic loss and storage modulus decrease. From the viscoelasticity study, except for 90:10 OWR, it is observed that as the oil water ratio increase, the yield stress and the flow point also increases. The 90:10 OBM shows no viscoelasticity behavior. Comparing the extreme 60:40 and 90:10 OBMs (i.e. as OWR increase), the experimental result shows that the sagging index increases by 9%. The dynamic sagging factor decreases as the ratio of storage modulus to loss modulus increases (i.e. as OWR decrease). Except for high viscosity and hydraulics, the overall analysis of drilling fluids shows that the 60:40 OWR is the better in terms of sagging, filtrate loss and hole cleaning performance.
APA, Harvard, Vancouver, ISO, and other styles
5

Lv, Qichao, Tongke Zhou, Yingting Luan, and Zhaoxia Dong. "Rheology and Dynamic Filtration of Foam Fracturing Fluid Enhanced by Cellulose Nanofibrils." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21361-ms.

Full text
Abstract:
Abstract Foam fracturing is an effective method for the development of unconventional reservoirs. However, due to lamellar film, high pressure differences within foam films, and the strong diffusivity of the internal phase, foam is prone to suffering from unstable phenomena such as rupture, drainage, disproportionation, etc., thus leading to uncontrollable foam flow behavior in the tube and formation. In this work, cellulose nanofibrils (CNFs) were used to enhance foam fracturing fluid. The target is not only to obtain a stable foam system, but also to control its rheology, proppant-carrying and leak-off behavior. The stability of the N2 foam fracturing fluid with CNFs was firstly explored via static tests by measuring its foam volume and liquid drainage. Then, the viscosity of foam fracturing fluids with different foam quality was measured using a tube viscometer under conditions of use, to evaluate the rheology of foam with CNFs. Subsequently, the proppant-carrying capacity was evaluated by observing suspension state of proppants in foam over time. The microscopic images of the foam with proppants were collected to analyze the interaction between bubbles and proppant. Finally, the dynamic filtration behavior and core damage of foam with CNFs were investigated by using a dynamic filtration apparatus. The results of the static tests showed that the stability of foam was significantly enhanced by the addition of CNFs, and the liquid drainage and gas diffusion could be effectively inhibited. Upon foam evolution, bare surfactant foam formed a polyhedral structure rapidly, while the CNFs enhanced foam maintained spherical and dense for a long time. The viscosity of foams with and without cellulose nanofibrils showed a shear thinning behavior. With the addition of CNFs, the viscosity of foam was improved by 3 - 6 times compared with bare surfactant foam and its value was increased with foam quality changing from 60% to 80%. The results of proppant-carrying tests indicated that the proppants suspension in foam was improved obviously as the cellulose nanofibrils were added. For CNFs-stabilized foam, the aqueous film of bubbles became thicker and the mechanical strength of foam structure was improved, thus enhancing the proppant suspension in the foams. Moreover, the filtration control performance of CNFs foam was also improved compared with bare surfactant foam. The filtration coefficient of CNFs foam fracturing fluid decreased with increasing CNFs concentration at a filtration pressure difference of 3 MPa, and core damage was maintained at a relatively low level. Additionally, the filtration coefficient of CNFs-stabilized foam and its core damage could be reduced with the increase of foam quality from 60% to 80%. The stability, rheology, proppant-carrying and dynamic filtration control of foam fracturing fluid enhanced by cellulose nanofibrils were explored in this work. The results show that the addition of CNFs effectively improves the stability of the foam, thus enabling the rheology, proppant-carrying and the dynamic filtration to be well controlled, which provides a high-performance and eco-friendly foam fracturing fluid.
APA, Harvard, Vancouver, ISO, and other styles
6

Lee, John, Ahmadi Tehrani, Steve Young, and Christine Nguyen. "Viscoelasticity and Drilling Fluid Performance." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23908.

Full text
Abstract:
Viscoelastic properties of drilling fluids are not often measured due to a lack of understanding of their impact on fluid performance as well as a lack of field equipment suitable for such measurements. A study has been conducted recently to evaluate the viscoelastic properties of xanthan gum and invert drilling fluids and their impact on barite suspension quality and rheology. Both a Brookfield YR-1 rheometer and a Bohlin Gemini 150 rheometer were used to generate data for comparison. The impact of viscoelasticity on steady-state rheology, thixotropy and shear thinning was evaluated using a multi-speed rheometer. A soon-to-be-adopted API recommended procedure was used to measure the barite sag tendency under dynamic conditions. Aqueous solutions of xanthan gum showed that viscoelasticity, shear thinning and thixotropy increased with increasing polymer concentration. When the solutions were weighed up with barite, they became more viscoelastic, slightly more thixotropic, but less shear thinning. Proper suspension of barite was observed at a xanthan gum concentration of 2 lb/bbl without any other additives. Compared to xanthan-barite suspensions, invert drilling fluids of similar density exhibited a greater viscoelasticity but less thixotropy and shear thinning. Treatment of invert drilling fluids with viscoelastic polymers resulted in a further enhancement of viscoelasticity and thixotropy, but a slight deterioration in shear thinning. Barite suspension quality showed a certain degree of correlation with viscoelasticity as well as steady-state rheology; however, these properties were temperature dependent for invert drilling fluids. Hydraulic analyses indicated that viscoelastic additives can impact fluid viscosity thus affecting pressure loss, equivalent circulating density and hole cleaning. Viscoelasticity enhancement may be used to improve barite suspension quality under certain conditions, but its impact on hydraulics must be carefully considered.
APA, Harvard, Vancouver, ISO, and other styles
7

Zhou, Hualu, Giang Vu, and David J. McClements. "Rubisco Proteins as Plant-based Alternatives to Egg White Proteins: Characterization of Thermal Gelation Properties." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/vamx3998.

Full text
Abstract:
RuBisCO proteins can be isolated from abundant and sustainable plant sources, such as duckweed (e.g., Lemnoideae). These plant-based globular proteins are capable of irreversibly unfolding and forming gels when heated, which means they may be able to mimic some of the functional attributes exhibited by animal globular proteins. In this study, we examined the ability of RuBisCo proteins to mimic the initial rheology and thermal gelation properties of egg white, which the aim of developing plant-based egg analogs. The impact of protein concentration (10-15% w/w), pH (7 to 9), and calcium concentration (0 to 50 mM CaCl2) on the properties of the egg white analogs was examined. The appearance (colorimetry), thermal denaturation (differential scanning calorimetry), thermal gelation (dynamic shear rheology), and texture profiles (compression testing) were measured. RuBisCO-based egg white analogs could be successfully produced at 10% protein content and pH 8 in the absence of salt. These RuBisCO protein solutions had similar apparent viscosity-shear rate profiles, shear modulus-temperature profiles, gelling temperatures, and final gel strengths as egg white. However, there were some differences. RuBisCO protein gels were slightly darker than egg white, which was attributed to the presence of some phenolic impurities. RuBisCo protein exhibited a single thermal transition temperature (~ 66 ℃) whereas egg white exhibited two (~66 and ~81 ℃). RuBisCo protein gels were more brittle but less chewy and resilient than egg white gels. This study provides valuable insights into the potential of RuBisCo protein for formulating plant-based egg white analogs, which may help improve the sustainability of the modern food supply.
APA, Harvard, Vancouver, ISO, and other styles
8

Gokdemir, Muzaffer Gorkem, Selcuk Erkekol, and Huseyin Ali Dogan. "Investigation of High Pressure Effect on Drilling Fluid Rheology." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61449.

Full text
Abstract:
Drilling fluid is the mixture of base fluid and special chemicals. The system is designed to meet operational requirements. These complex fluids can carry drilled cuttings to surface, provide enough force or pressure to the formation and have adequate holding capacity in pump-off period to prevent particle precipitation. These necessities are controlled by fluid rheology. The art of flow or flow science, i.e. rheology, examines the deformation and flow behavior of the fluid. Ideal viscous flow through ideal elastic deformation is analyzed in this branch. Increase in energy demand and depletion of shallow hydrocarbon reserves has driven the industry to explore deeper reservoirs. Thanks to the technical developments in the drilling industry, operations can go further, especially in offshore wells. Non-aqueous conventional drilling fluid systems (NAS), synthetic based mud (SBM) or oil based mud (OBM), are favorable due to lubricity effect, high inhibitive characteristic and temperature-rheological stability in deep formations. Despite the advantages of NAS over the water based systems (WBM), their flow characteristics vary with pressure due to compressibility. Mezger stated that “For most liquids, the viscosity values are increasing with increasing pressure since the amount of free volume within the internal structure is decreasing due to compression, therefore the molecules are more and more limited in their mobility. This increases the internal frictional forces and the flow resistance”1. By considering the primary well control requirements, drilling fluid equivalent pressure in both static and dynamic conditions can overbalance the fluid pressure in the rock pores and cannot exceed the inelastic strength of the medium in conventional, over-balanced operations. Mud playing pressure window shrinks as the depth is increased and is even not tolerable in ultra-deep offshore wells. Incompetent fluid formulation and hydraulic design led to detrimental and vital problems. In literature, limited research on high pressure fluid deformation behavior and rheological experimental data are found to understand the flow behavior and rheological changes in down hole conditions2. Generally rheological measurements are taken at the surface conditions and extrapolated to the down hole conditions that cause the perversity in real high pressure deformation behavior. This study is conducted to examine the high pressure effect on NAS rheology and to compare the experimental results to the conventional WBM. High Pressure, High Temperature (HPHT) Anton Paar MCR-302 compact rheometer (1,000 bar–14,500 psi, 300°C capacity) is preferred rather than using HPHT viscometers due to exact frictionless air bearings in the laboratory experiments. Controlled shear rate (CSR) and rate sweep test methodologies are used in the rheological tests. Tests are performed from ambient surface conditions to 12,000 psi pressure at constant temperature. To get a better understanding of flow properties and to have a more accurate hydraulic design, rheological characterization is simulated under in-situ conditions. Test results are analyzed to understand the compressibility and pressure effects on rheological parameters in constitutive equation (yield stress, apparent viscosity, and flow behavior index) and deformation behavior.
APA, Harvard, Vancouver, ISO, and other styles
9

Miller, JJ, and Dale E. Jamison. "Evolution of Dynamic Sag Testing Methods." In SPE/IADC Middle East Drilling Technology Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/202196-ms.

Full text
Abstract:
Abstract Maintaining the integrity of the drilling-fluid column is vital for safety and operational efficiency. Stable, controlled fluid density provides a primary pressure barrier during the drilling phase. Non-aqueous fluids (NAFs) provide huge benefits for nearly all aspects of difficult drilling situations, yet still can have challenges related to weight suspension. The geometry and annular restrictions of modern well designs often demand low fluid rheology parameters to avoid excessive circulating pressures, and this unsurprisingly increases the risks of sagging weight material. Given the importance of understanding the fluid behaviors in these situations, operators and service companies have made significant efforts to develop reliable sag testing methods. Older methods of testing neglected movement and instead centered on mimicking the downhole conditions such as temperature and hydrostatic pressure. Variations of this static aging method addressed the critical angle where Boycott settling accelerates the sag. More complex, dynamic methods were devised later in time to provide greater insight on sag behaviors. Although engineers and scientists have made numerous strides to create a definitive sag test, the current tests have limited capabilities. Very few are capable of working in an offshore environment. Sag events continue to be costly and problematic to operators’ main objectives of drilling and completing their wells safely and efficiently. The authors address results from the current state of the art in sag testing and compare these to a proprietary dynamic procedure created in 2019. While the method is still in development, its capabilities have been well defined. Fluid samples are kept in constant motion at low-ranging shear rates and elevated temperatures to simulate sag-prone conditions downhole. Results indicate a high degree of correlation to the expected sag with different sizes of barite in low-ECD fluids.
APA, Harvard, Vancouver, ISO, and other styles
10

Dirama, Taner E., and Lloyd A. Goettler. "Processing Characteristics of Layered Silicate Nanocomposites With Application to Blown Film." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33942.

Full text
Abstract:
The aim of this study is to investigate the film blowing processing of various polyamide 6-based layered silicate nanocomposites (LSN’s) and to correlate their processing behaviors to the underlying rheology and structure. In-situ polymerized nanocomposites were found to possess a wider processing window compared to the base PA6. Shear and dynamic rheological measurements were employed to correlate the rheological behavior of the nanocomposites to the bubble formation and stability in the film blowing process. The in-situ plymerized LSN melts having higher elastic modulus (G′) were found to perform better in the film blowing process. DSC measurements indicated that nanoclays induce the γ type of crystallinity, which may also play a role in film blowing behavior.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Dynamic shear rheology' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography