Relevant bibliographies by topics / Apparent Viscosity

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Apparent Viscosity'

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Published: 4 June 2021
Last updated: 29 May 2022

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Journal articles on the topic "Apparent Viscosity"

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SHIMADA, K., and S. KAMIYAMA. "HYDRODYNAMIC CHARACTERISTICS OF ELECTRORHEOLOGICAL FLUID IN A PARALLEL DUCT FLOW." International Journal of Modern Physics B 15, no. 06n07 (March 20, 2001): 980–87. http://dx.doi.org/10.1142/s0217979201005507.

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An experimental investigation is conducted to clarify the hydrodynamic characteristics of ERF with elastic particles of smectite in a two-dimensional parallel duct of various widths. Experimental data on pressure difference to a volumetric flow rate in a supplying D.C. electric field are measured. These data are arranged to obtain the apparent viscosit by using the integral method of rheology. From the data of apparent viscosity, the wall friction coefficient is obtained. The increment of the apparent viscosity caused by the applying electric field is a function of shear rate as well as the electric field strength and the width of the duct. However, the wall friction coefficient is not a function of elecric field strength and the width of the parallel duct, but only of shear rate. The yield stress is a function of the width of the parallel duct as well as of electric field strength. The ratio of Non-Newtonian viscosity in the apparent viscosity is varied by the intensity of the shear rate.
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HIRAI, Masazumi, Katsuhiro TAKEBAYASHI, Yuji YOSHIKAWA, and Ryoji YAMAGUCHI. "Apparent Viscosity of Semi-solid Metals." Tetsu-to-Hagane 78, no. 6 (1992): 902–9. http://dx.doi.org/10.2355/tetsutohagane1955.78.6_902.

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ZAMORA, M. C. "RELATIONSHIPS BETWEEN SENSORY VISCOSITY AND APPARENT VISCOSITY OF CORN STARCH PASTES." Journal of Texture Studies 26, no. 2 (May 1995): 217–30. http://dx.doi.org/10.1111/j.1745-4603.1995.tb00795.x.

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Al-Khdheeawi, Emad A., and Doaa Saleh Mahdi. "Apparent Viscosity Prediction of Water-Based Muds Using Empirical Correlation and an Artificial Neural Network." Energies 12, no. 16 (August 9, 2019): 3067. http://dx.doi.org/10.3390/en12163067.

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Apparent viscosity is of one of the main rheological properties of drilling fluid. Monitoring apparent viscosity during drilling operations is very important to prevent various drilling problems and improve well cleaning efficiency. Apparent viscosity can be measured in the laboratory using rheometer or viscometer devices. However, this laboratory measurement is a time-consuming operation. Thus, in this paper, we have developed a new empirical correlation and a new artificial neural network model to predict the apparent viscosity of drilling fluid as a function of two simple and fast measurements of drilling mud (i.e., March funnel viscosity and mud density). 142 experimental measurements for different drilling mud samples have been used to develop the new correlation. The calculated apparent viscosity from the developed correlation and neural network model has been compared with the measured apparent viscosity from the laboratory. The results show that the developed correlation and neural network model predict the apparent viscosity with very good accuracy. The new correlation and neural network models predict the apparent viscosity with a correlation coefficient (R) of 98.8% and 98.1% and an average absolute error (AAE) of 8.6% and 10.9%, respectively, compared to the R of 89.2% and AAE of 20.3% if the literature correlations are used. Thus, we conclude that the newly developed correlation and artificial neural network (ANN) models are preferable to predict the apparent viscosity of drilling fluid.
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Wan, Wen Bo, Li Juan Han, Guo Qin Liu, and Xin Qi Liu. "Effect of Storage Conditions on Apparent Viscosity of Oleogel Developed by β-Sitosterol and Lecithin with Sunflower Oil." Advanced Materials Research 1004-1005 (August 2014): 903–7. http://dx.doi.org/10.4028/www.scientific.net/amr.1004-1005.903.

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The influence of storage conditions on apparent viscosity of mixtures of β-sitosterol and lecithin in sunflower oil was studied using rheology. The results showed the apparent viscosity of oleogel decreased with the increase of the speed of shear and storage temperature, while incresed with prolong of time in experiment conditions. The β-sitosterol and lecithin ratio also affected the apparent viscosity; solutions with ratio (70 β-sitosterol-30 lecithin) performed the highest apparent viscosity. What’s more, all the samples were pseudoplastic fluid. The apparent viscosity of the oleogel depends on storage temperature, storage time and organogelator ratios.
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Chen, Shih-Hsin, Jun-Jay Lee, and Chi-Yia Maa. "Apparent Viscosity of a Monodispersed Liquid Aerosol." Aerosol and Air Quality Research 2, no. 1 (2002): 71–86. http://dx.doi.org/10.4209/aaqr.2002.06.0008.

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LANG, ELIZABETH ROBINSON, and CHOKYUN RHA. "Apparent shear viscosity of native egg white." International Journal of Food Science & Technology 17, no. 5 (June 28, 2007): 595–606. http://dx.doi.org/10.1111/j.1365-2621.1982.tb00219.x.

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Gallo, T. A., and L. C. Klein. "Apparent viscosity of sol-gel processed silica." Journal of Non-Crystalline Solids 82, no. 1-3 (June 1986): 198–204. http://dx.doi.org/10.1016/0022-3093(86)90131-6.

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Lee, Jae Keun, and Gyo Taeg Seo. "Apparent elongational viscosity of dilute polymer solutions." Korean Journal of Chemical Engineering 13, no. 6 (November 1996): 554–58. http://dx.doi.org/10.1007/bf02706020.

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Xu, Na, and Jinjia Wei. "Time-Dependent Shear-Induced Nonlinear Viscosity Effects in Dilute CTAC/NaSal Solutions: Mechanism Analyses." Advances in Mechanical Engineering 6 (January 1, 2014): 179394. http://dx.doi.org/10.1155/2014/179394.

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The time-dependent shear-induced nonlinear viscosity effects of dilute surfactant solutions (CTAC/NaSal) at constant shear rate were tested by using the rheometer Couette cell. The apparent viscosity evolution curve can be divided into five stages: weak shear-thickening (Stage I), weak shear-thinning and plateau (Stage II), sharp shear-thickening (Stage III), oscillating adjustment (Stage IV), and rough plateau (Stage V). In Stage I, the stretching effects of shear flow lead to the weak increase in apparent viscosity at the inception of shearing. The apparent viscosity curve firstly decreases in Stage II and then levels off. The apparent viscosity plateau is caused by the forming and slipping of micellar lumps at the inner cylinder wall surface. Once the volume of lump exceeds a certain degree, the nucleation process of forming SIS is triggered, which is the beginning of Stage III and then the apparent viscosity increases sharply. The variations of apparent viscosity in adjusting period are rather complicated in Stage IV, and the variations mainly depend on the situation of SISs network. In Stage V, coupled with obvious oscillations, the apparent viscosity maintains a basically constant plateau value, indicating that the SISs network is fully developed and saturated at the corresponding shear rate.
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Dissertations / Theses on the topic "Apparent Viscosity"

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Puli, Goutham. "Effects of Xanthan/Locust Bean Gum Mixtures on the Physicochemical Properties and Oxidative Stability of Whey Protein Stabilized Oil-In-Water Emulsions." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1288.

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Scientific evidence shows that dietary intake of the omega-3 polyunsaturated fatty acids is beneficial to human health. Fish oil is a rich source of omega-3 fatty acids. However, fish oil with high levels of omega-3 PUFA is very susceptible to oxidative deterioration during storage. The objective of this study was to investigate the effect of xanthan gum (XG)-locust bean gum (LBG) mixtures on the physicochemical properties of whey protein isolate (WPI) stabilized oil-in-water (O/W) emulsions containing 20% v/v menhaden oil. The O/W emulsions containing XG/LBG mixtures were compared to emulsions with either XG or LBG alone. The emulsions were prepared using a sonicator by first mixing menhaden oil into the WPI solution and then either XG, LBG or XG/LBG mixtures were added. WPI solution (2 wt%) and gum solutions (0.0,0.05, 0.1, 0.15, 0.2 and 0.5 wt%) were prepared separately by dissolving measured quantities of WPI in distilled water. XG and LBG gums were blended in a synergistic ratios of 50:50 for the mixture. The emulsions were evaluated for apparent viscosity, microstructure, creaming stability and oxidative stability. Addition of 0.15, 0.2 and 0.5 wt% XG/LBG mixtures greatly decreased the creaming of the emulsion. The emulsion with 0.15, 0.2 and 0.5 wt% XG/LBG mixtures showed no visible serum separation during 15 d of storage. The apparent viscosity of the emulsions containing XG/LBG mixtures was significantly higher (p < 0.05) than the emulsions containing either XG or LBG alone. The viscosity was sharply enhanced at higher concentrations of XG/LBG mixtures. Microstructure images showed depletion flocculation for LBG (0.05-0.5 wt%), XG (0.05- 0.2 wt%) and XG/LBG mixtures (0.05 and 0.1 wt%) emulsions. Flocculation was decreased with the increased biopolymer concentration in the emulsion. The decrease in flocculation was much pronounced for the emulsion containing XG/LBG mixtures. The rate of lipid oxidation for 8 week storage was significantly (p < 0.05) lower in emulsions containing XG/LBG mixtures than in emulsions containing either of the biopolymer alone. The results suggested that the addition of XG/LBG mixtures greatly enhanced the creaming and oxidative stability of the WPI-stabilized menhaden O/W emulsion as compared to either XG or LBG alone.
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Pereira, João Batista. "Desenvolvimento de aparato automatizado de slump test : ferramenta de controle de qualidade e de caracterização reológica de materiais /." Ilha Solteira, 2018. http://hdl.handle.net/11449/157181.

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Orientador: Geraldo de Freitas Maciel
Resumo: O ensaio de abatimento de tronco de cone, desenvolvido inicialmente como ferramenta de controle de qualidade para avaliar a consistência de materiais cimentícios e com grande aplicação no setor da construção civil, tem sido cada vez mais empregado para análise de materiais de diferentes setores, seja da indústria do petróleo, da mineração e mesmo de alimentos. O interesse de diferentes setores industriais pela medida do abatimento deve-se a esta possibilitar uma ferramenta de controle de qualidade de materiais e ainda fornecer um mecanismo simples e fácil para a determinação de um importante parâmetro reológico, a tensão limite de escoamento. Nesse contexto, esta dissertação de mestrado apresenta o desenvolvimento de um aparato experimental capaz de realizar, de forma automatizada, o ensaio de abatimento de tronco de cone (comumente conhecido por slump test), desde o levantamento do cone de Abrams até a medição do abatimento. A partir do equipamento desenvolvido, três abordagens são realizadas e discutidas ao longo desta dissertação, tendo como materiais avaliados os géis de carbopol (fluido teste reologicamente representativo de lamas), lamas, argamassas e concretos. A primeira abordagem diz respeito a funcionalidade e operacionalidade do aparato automatizado de slump test. A segunda abordagem apresenta modelos empíricos de determinação da tensão limite de escoamento e viscosidade aparente, a partir da medida mais rigorosa de abatimento e outras informações fornecidas pelo a... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The slump test was, initially, developed as a quality control tool for evaluating the consistency of cement-based materials, with many applications in civil engineering, it has been used for the analysis of materials in different sections of petrol industries, mining, and even food industries. The interest of these different industrial sections in the slump is due to its possible role as quality control tool of materials, providing an easy and simple mechanism for the determination of an important rheological parameter: the yield stress. In this context, this dissertation presents the development of an experimental apparatus capable of obtaining, in such automated way, the slump test, since the lifting of the Abrams cone to the obtaining of the slump. From the apparatus, three approaches are presented and discussed in this text, showing the results for the evaluation of materials such as carbopol gel (a rheological representative fluid of mud), mud, concrete and mortar. The first approach deals with the functionality of the automated apparatus for slump test. The second approach presents empiric models for the determination of yield stress and apparent viscosity, from the slump and further information obtained by the automated apparatus. The third and last approach presents the numerical simulation and validation of the slump test by the use of FLUENT software, considering the Non-Newtonian property (Herschel-Bulkley’s fluid) of the tested materials, and the trial of the mode... (Complete abstract click electronic access below)
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Arellano, Salazar Marcela Patricia. "Caractérisation expérimentale et modélisation de systèmes multiphasiques au cours du procédé de congélation à l’échelle pilote : Application à la fabrication de sorbets dans des échangeurs à surface raclée." Thesis, Paris, AgroParisTech, 2012. http://www.theses.fr/2012AGPT0088/document.

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La congélation partielle du mix dans un échangeur de chaleur à surface raclée (ECSR)est l'étape la plus critique dans la fabrication d'un sorbet, car c'est la seule étape où de nouveaux cristaux de glace se forment; par la suite ces cristaux ne font que grossir. L'objectif principal est de produire un grand nombre de cristaux les plus petits possibles afin d'obtenir une texture onctueuse. Pendant le procédé de congélation, le produit est soumis à des interactions couplées d'écoulement du fluide, de transfert de chaleur, de changement de phase et de cisaillement. Ces interactions sont déterminées par les conditions opératoires du procédé de congélation et affectent l'évolution de la distribution de taille des cristaux de glace, ainsi que la texture finale du produit. Ce travail présente la caractérisation expérimentale et la modélisation du procédé de congélation d'un sorbet. La congélation du sorbet à été effectuée dans un ECSR à l'échelle pilote. L'objectif principal de ce travail est l'étude de l'influence des conditions opératoires du procédé de congélation sur les caractéristiques finales du produit: distribution de taille de cristaux de glace, température du produit, fraction volumique de glace et viscosité apparente. Le comportement de l'écoulement du produit dans l'ECSR a été caractérisé par une étude expérimentale et une modélisation de la distribution du temps de séjour (DTS). Une approche de modélisation de la cristallisation de la glace couplant le modèle de DTS avec des équations de transfert de chaleur et de bilan de population des différentes classes de taille de cristaux a été développée. À partir d'une première estimation des paramètres, le modèle de cristallisation prédit de façon satisfaisante les tendances expérimentales et donne un bon aperçu de l'évolution de la distribution de taille des cristaux de glace au cours du procédé de congélation dans l'ECSR
The partial freezing of the mix inside the scraped surface heat exchanger (SSHE) is the most critical step in sorbet manufacturing, since it is the only stage where new ice crystals are produced; further in the process these ice crystals will only grow. The main objective of the freezing process is to form the smallest possible ice crystals, so as to assure a smooth texture in the final product. During the freezing process the product is subjected to coupled interactions of fluid flow, heat transfer, ice phase change and shear. These interactions are determined by the freezing operating conditions and affect the evolution of the ice crystals size distribution (CSD) and the final texture of the product. This work presents the experimental characterization and the modelling of the initial freezing process of a sorbet. The freezing of sorbet was carried out in a SSHE at the pilot scale. The main objective of this work was the study of the influence of the freezing operating conditions on the final product characteristics: ice CSD, product temperature, ice volume fraction, apparent viscosity. The product flow behaviour in the SSHE was characterized by an experimental and modelling study of the residence time distribution (RTD) of the product. An ice crystallization modelling approach, taking into account the coupling of an empirical RTD model with heat transfer equations and a population balance of the different ice crystal size classes was developed. With a first set of estimated parameters, the ice crystallization model predicts satisfactorily the experimental trends, and made it possible to have an insight on the evolution of ice CSD during the freezing process in the SSHE
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Nagaraju, Yathiraj. "Contribution to the Understanding of the Rheological Behaviour of Recycled Concrete Aggregate Mixtures Made of Coarse and Fine Particles." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40684.

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The use of recycled concrete aggregates (RCA) has gained increased attention in the past few decades as an alternative to decrease the carbon footprint of concrete construction. Yet, most of the research performed so far demonstrates that RCA concrete displays inferior performance in the fresh and hardened states when compared to conventional concrete (CC). The latter is believed due to the fact that very often the different microstructure of RCA is not accounted for while the mix-proportioning of RCA concrete. Recently, a number of mix-design procedures accounting for RCA microstructure have been proposed. Amongst them, the Equivalent Volume (EV) method seems to be quite promising. The EV method may proportion RCA concrete made of coarse (CRCA) or fine (FRCA) RCA and is based on a companion CC. Previous research has demonstrated that the fresh and hardened properties of EV mix-designed CRCA are suitable for structural applications. Yet, very few research, analysis and quantification have been conducted on the fresh behaviour of EV mix- proportioned FRCA concrete. This work presents a comprehensive study on the rheological behaviour of EV mix-designed CRCA and FRCA concrete presenting distinct features (i.e. inner qualities, mineralogy, fabrication process, etc.) through the use of a planetary rheometer (IBB). Results show that the EV is capable of proportioning low embodied energy CRCA and FRCA concrete with shear thinning profiles. The latter suggests that these mixtures are suitable for applications under high torque regimes such as vibrated or pumped concrete.
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NORONHA, Elisa Vila Nova de. "Avalia??o de medidas reol?gicas em viscos?metro online." Universidade Federal Rural do Rio de Janeiro, 2016. https://tede.ufrrj.br/jspui/handle/jspui/2145.

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Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2017-10-31T17:20:21Z No. of bitstreams: 1 2016 - Elisa Vila Nova de Noronha.pdf: 4419781 bytes, checksum: 0804df588af66f56621082802458f769 (MD5)
Made available in DSpace on 2017-10-31T17:20:21Z (GMT). No. of bitstreams: 1 2016 - Elisa Vila Nova de Noronha.pdf: 4419781 bytes, checksum: 0804df588af66f56621082802458f769 (MD5) Previous issue date: 2016-12-21
For the drilling process to succeed, it is necessary the use of a drilling fluid. The measurement of rheological properties from these fluids becomes important in order to allow good hydraulic gusher maintenance and management. If these measures are taken in an on- line order that will mean agility in decision-making about the maintenance of the properties of the fluid and it will result in savings of thousands of dollars during the drilling of a well. It is in this context that this current report, developed in the UFRRJ laboratory of fluid flow, aims to evaluate the performance of a modified and calibrated process viscometer, making it a unique equipment for conducting real-time measures of apparent viscosity and thixotropy curve. The process viscometer chosen has the geometry of coaxial cylinders being, thus similar to the current workbench equipment used in drilling rigs. The modified viscometer performance was confronted with the rheometer benchtop Haake Rheostress 1. Different compositions of fluids, containing assorted concentrations of viscosifier polymers and suspension solid have been tested. The results indicated that there was an agreement on the results towards a considered error permissible for a viscometer process. The online viscometer brings a pioneering real-time measuring capacity and plotting of rheological behavior curves towards the current technology used in drilling operation.
Para que o processo de perfura??o seja bem-sucedido, ? necess?rio o uso de um fluido de perfura??o. A medi??o das propriedades reol?gicas destes fluidos torna-se importante para permitir uma boa manuten??o e gest?o hidr?ulica do po?o. Se estas medidas forem realizadas de forma online isso significar? agilidade na tomada de decis?o sobre a manuten??o das propriedades do fluido e acarretar? na economia de milhares de d?lares durante a perfura??o de um po?o. ? neste contexto que o presente trabalho, desenvolvido no Laborat?rio de Escoamento de Fluidos da UFRRJ, tem como objetivo avaliar o desempenho de um viscos?metro de processo modificado e calibrado, tornando-o em um equipamento exclusivo, para realizar medidas em tempo real de curva de viscosidade aparente e tixotropia. O viscos?metro de processo escolhido tem a mesma geometria de cilindros coaxiais sendo desta forma semelhante ao atual equipamento de bancada utilizado nas sondas de perfura??o. O desempenho do viscos?metro modificado foi confrontado com o re?metro de bancada Haake Rheostress 1. Foram testadas diferentes composi??es de fluidos contendo concentra??es variadas de pol?meros viscosificantes e s?lidos em suspens?o. Os resultados obtidos indicaram que houve concord?ncia nos resultados diante de um erro considerado admiss?vel para um viscos?metro de processo. Acredita-se que o viscos?metro online avaliado traz uma capacidade pioneira de medi??o em tempo real e plotagem de curvas de comportamento reol?gico diante da atual tecnologia utilizada na ?rea petroqu?mica.
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Sadik, Mohamed. "Développement d'un appareil de fluorescence automatique et informatise en vue d'une utilisation pluriméthodologique." Vandoeuvre-les-Nancy, INPL, 1992. http://www.theses.fr/1992INPL124N.

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Les techniques de fluorescence présentent un intérêt certain en biologie cellulaire comme en biologie clinique. En biologie cellulaire, elles permettent une approche qualitative de la viscosité des milieux biologiques. En biologie clinique, des dosages de molécules d'intérêt biologique et pharmacologiques peuvent être réalisés; de la même façon, la mesure des paramètres de la coagulation du sang peut être effectuée. L'objectif de ce travail a été le développement d'un appareil de fluorescence automatise et informatise en vue d'une utilisation pluriméthodologique. La première partie est consacrée à une étude théorique et bibliographique portant sur la fluorescence et les méthodes associées qui peuvent être utilisées avec le système instrumental développé. La deuxième partie traite l'aspect technique du système (optique et électronique). La troisième partie présente le système informatique (matériel et logiciel). La quatrième partie regroupe, enfin, les tests de validation du système au niveau biologique et ce, pour les différents types de mesure
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Deleplace, Bérangère. "Approche expérimentale de la turbulence par mesures de viscosité apparente dans les fluides en rotation : application au couplage visco-magnétique de l'interface noyau-manteau." Université Joseph Fourier (Grenoble), 2005. http://www.theses.fr/2005GRE10151.

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Nous développons une méthode pour mesurer la viscosité apparente dans les fluides en rotation rapide. Celle-ci consiste à mesurer la vitesse azimutale du fluide pendant le régime transitoire de synchronisation qui apparaît lors des expériences de spin-up/spin-down (augmentation ou diminution de la vitesse de rotation du récipient). Les différences observées entre les régimes laminaires et les régimes turbulents donnent une information sur la contribution de la turbulence dans le transport de quantité de mouvement entre le fluide et la paroi. Quatre dispositifs expérimentaux ont été utilisés afin d'évaluer l'impact de la géométrie du récipient et des mécanismes de forçage de la turbulence sur ces mesures de viscosité apparente. L'étude montre que tous deux contribuent fortement à la modification de viscosité apparente observée. Dans le cas d'expériences de convection thermique en géométrie sphérique, afin d'expliquer l'augmentation uniforme de la viscosité apparente, une loi d'échelle faisant intervenir l'écart au seuil et le nombre d'Ekman est proposée. En ce qui concerne les autres expériences ( Convection thermique sphérique en gallium, couette spherique, convection thermique en géométrie cylindrique), la modification de viscosité n'est pas uniforme dans le volume et ne peut être reliée à des grandeurs globales. Dans ce deuxième cas, l'origine de la modification vient du mécanisme de forçage ou du développement d'instabilités associées au mouvement de spin-up en régime turbulent. Au dela de cette etude experimentale, nous avons calculé le couplage visco-magnétique à l'interface noyau liquide - manteau solide d'une Terre en nutation. Nous avons fait varier dans ce calcul la viscosité apparente du fluide et la conductivité électrique du manteau afin d'analyser les contributions des couples magnétiques et visqueux au couplage de l'interface. Différentes modélisations du champ magnétique terrestre sont envisagées afin d'estimer la contribution des petites échelles du champ à ces couplages. La confrontation de ce calcul aux valeurs des constantes de couplage des modèles de nutations permet d'obtenir une estimation de la viscosité efficace nécessaire dans le noyau. Une viscosité efficace de 10-2m2. S-1dans le noyau terrestre est nécessaire pour expliquer les données de nutations
We present an experimental method to estimate the eddy viscosity in rotating bounding fluids. By measures of the azimuthal component of the velocity during spin-up/spin-down experiments, we retrieve the viscosity (using the linear theory of Greenspan). Differences between laminar and turbulent regimes give an estimate of the momentum transport between fluid and boundaries operated by eddies. Works have been done on four experiments in order to evaluate the impact of the geometry and the contribution of turbulent mechanisms. Both interact in the change of eddy viscosity. In experiments of thermal convection in spherical shell, the increase of eddy viscosity is explained by a scaling law in Ra/Rac E1/3. For the remainder experiments, the change in viscosity is not uniform in the volume and no global quantities can modelize this effect. This change may be explained by the turbulent mechanism (experiment of differential rotation) or by instabilities that develop during convective spin-up (experiment of convection in cylindrical geometry). Theoretical work has also been done. Differential rotation between core and mantle induce torques and we derive the visco-magnetic torque at the CMB for spin over motions. We estimate the influence of eddy viscosity, electrical conductivity of the mantle, geometry and intensity of the magnetic field on the visco-magnetic torque. The value of the coupling constant given by nutation models shows that apparent viscosity 10-2m2. S-1 (104 bigger that the liquid iron molecular viscosity) is needed to explain nutation's data
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Chrobák, Jan. "Analýza vlastností provozních kapalin." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219800.

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This diploma thesis is focused on introducing the mathematical and physical fundamentals of viskosity, density and refractive index of liquids and methods of its measurement. Based on available literatures specify review of areas in which the measurement of dynamic viscosity is used for evaluation the actual state of liquid materials. Discuss the possibility of using for example variables to determine the concentration of fat in milk and ethanol in alcoholic beverages. The sample of liquid to realize the practical measurements.
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Aroulmoji, Vincent. "Approches physico-chimique et par RMN du proton des intéractions eau-molécules sapides et mécanisme de perception des mélanges de saveurs." Reims, 2002. http://www.theses.fr/2002REIMS017.

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Les propriétés physico-chimiques des sucres (glucose, fructose, saccharose) des gluconates de Na, K et Mg, de la caféine et de leurs mélanges sont déterminées dans l'eau avec l'objectif d'interpréter le mécanisme de perception de leur saveur. Les méthodes utilisées sont la viscosimétrie, la densitométrie, la compressibilité, les propriétés de surface et la RMN du proton. A partir des résultats de viscosimétrie, on accède au volume hydrodynamique et au coefficient d'interaction solvant/soluté. Le volume spécifique apparent informe sur la compatibilité entre soluté et solvant. Les propriétés de surface informent sur l'hydrophobie des substances étudiées et leur aptitude à s'adsorber sur une interface hydrophobe. La RMN du proton (vitesses de relaxation) aide à interpréter la chimioréception du goût à partir de la mobilité de l'eau. Les résultants obtenus à partir de deux groupes de méthodes indépendantes (physico-chimie, RMN) aident à élucider le rôle de l'eau dans la perception du goût.
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Fry, Benjamin. "Modélisation multi-échelle d'un lit granulaire entraîné par un écoulement cisaillé." Thesis, Toulouse, INPT, 2019. http://www.theses.fr/2019INPT0132.

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Dans cette thèse, on étudie le transport granulaire par charriage en régime établi d’un lit de grains soumis à un écoulement de Couette laminaire pour un rapport de densité fluide-grain de 2.5 et une gamme de nombre de Reynolds particulaire, Re p [0.1, 10], et de nombre de Shields, [0.1,0.7]. Toutes les échelles de cet écoulement diphasique (à l’exception des effets de lubrification) sont décrites via la résolution numérique des équations de Navier-Stokes en prenant en compte la présence des particules par une méthode de frontières immergées (IBM) couplée à un solveur granulaire (méthode des éléments discrets - DEM) qui résout les équations de Newton pour chaque particule ainsi que les contacts et frottements entre grains (résolution à l’échelle microscopique). Un changement d’échelle est ensuite effectué afin d’obtenir une description de l’écoulement via des champs continus équivalents (description à l’échelle mésoscopique). Les simulations IBM-DEM permettent de quantifier chacun des termes du modèle dit mésoscopique et de caractériser la rhéologie de chaque phase ainsi que du mélange. On effectue finalement un second changement d’échelle afin de réduire l’écoulement de grains observé à une singularité, qui correspond à une condition limite du point de vue de l’écoulement du fluide. Cette condition est du type de Navier. Les simulations IBM-DEM montrent que la longueur dite de glissement "équivalente" est directement proportionnelle au nombre de Shields
In this work, we consider the steady transport of a granular medium by a laminar Couette flow for a fixed density ratio of 2.5 and a range of particle Reynolds number, Re p [0.1, 10], and Shields number [0.1, 0.7]. All scales of this two-phase flow are captured (except for the lubrication effects). By solving the Navier-Stokes equations, taking into account the presence of particles using an Immersed Boundary Method (IBM) coupled to a granular solver (Discrete Elements Method - DEM) which solves the Newton equations for each particle, in particular grain-grain interactions (resolution at the microscopic scale). Up-scaling is then performed to describe the flow via equivalent continuous quantities (description at the mesoscopic scale). IBM-DEM simulations allow to quantify all the terms of the so-called mesoscopic model and to characterize the rheology of each phase and that of the equivalent mixture. A second up-scaling is finally performed to reduce the granular flow to a singularity, which corresponds to a boundary condition from the fluid view point. The boundary condition is of Navier’s type. The IBM-DEM simulations suggest that the corresponding "equivalent" slip-lenght scales as
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Books on the topic "Apparent Viscosity"

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Sample, I. R. The apparent viscosity-temperature relationship of high temperature glass-ceramic bonds for use in solid oxide fuel cells. Manchester: UMIST, 1992.

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Horing, Norman J. Morgenstern. Superfluidity and Superconductivity. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198791942.003.0013.

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Chapter 13 addresses Bose condensation in superfluids (and superconductors), which involves the field operator ψ‎ having a c-number component (<ψ(x,t)>≠0), challenging number conservation. The nonlinear Gross-Pitaevskii equation is derived for this condensate wave function<ψ>=ψ−ψ˜, facilitating identification of the coherence length and the core region of vortex motion. The noncondensate Green’s function G˜1(1,1′)=−i<(ψ˜(1)ψ˜+(1′))+> and the nonvanishing anomalous correlation function F˜∗(2,1′)=−i<(ψ˜+(2)ψ˜+(1′))+> describe the dynamics and elementary excitations of the non-condensate states and are discussed in conjunction with Landau’s criterion for viscosity. Associated concepts of off-diagonal long-range order and the interpretation of <ψ> as a superfluid order parameter are also introduced. Anderson’s Bose-condensed state, as a phase-coherent wave packet superposition of number states, resolves issues of number conservation. Superconductivity involves bound Cooper pairs of electrons capable of Bose condensation and superfluid behavior. Correspondingly, the two-particle Green’s function has a term involving a product of anomalous bound-Cooper-pair condensate wave functions of the type F(1,2)=−i<(ψ(1)ψ(2))+>≠0, such that G2(1,2;1′,2′)=F(1,2)F+(1′,2′)+G˜2(1,2;1′,2′). Here, G˜2 describes the dynamics/excitations of the non-superfluid-condensate states, while nonvanishing F,F+ represent a phase-coherent wave packet superposition of Cooper-pair number states and off-diagonal long range order. Employing this form of G2 in the G1-equation couples the condensed state with the non-condensate excitations. Taken jointly with the dynamical equation for F(1,2), this leads to the Gorkov equations, encompassing the Bardeen–Cooper–Schrieffer (BCS) energy gap, critical temperature, and Bogoliubov-de Gennes eigenfunction Bogoliubons. Superconductor thermodynamics and critical magnetic field are discussed. For a weak magnetic field, the Gorkov-equations lead to Ginzburg–Landau theory and a nonlinear Schrödinger-like equation for the pair wave function and the associated supercurrent, along with identification of the Cooper pair density. Furthermore, Chapter 13 addresses the apparent lack of gauge invariance of London theory with an elegant variational analysis involving re-gauging the potentials, yielding a manifestly gauge invariant generalization of the London equation. Consistency with the equation of continuity implies the existence of Anderson’s acoustic normal mode, which is supplanted by the plasmon for Coulomb interaction. Type II superconductors and the penetration (and interaction) of quantized magnetic flux lines are also discussed. Finally, Chapter 13 addresses Josephson tunneling between superconductors.
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Book chapters on the topic "Apparent Viscosity"

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Gooch, Jan W. "Viscosity, Apparent." In Encyclopedic Dictionary of Polymers, 799. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_12599.

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Gooch, Jan W. "Apparent Viscosity." In Encyclopedic Dictionary of Polymers, 45. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_740.

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Zhang, Yanling, Zhuoqing An, Qi Li, and Zhancheng Guo. "Apparent Viscosity Measurement of Iron Particles." In 6th International Symposium on High-Temperature Metallurgical Processing, 559–64. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119093381.ch71.

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Zhang, Yanling, Zhuoqing An, Qi Li, and Zhancheng Guo. "Apparent Viscosity Measurement of Iron Particles." In 6th International Symposium on High-Temperature Metallurgical Processing, 559–64. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-48217-0_71.

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Liu, Wen, Shu Ming Xing, and Mi Lan Zhang. "Study on Apparent Viscosity of Semi-Solid Alloys during Rheocasting." In Solid State Phenomena, 665–70. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-59-0.665.

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Nemoto, Iku, Kazuhito Ogura, and Hiroyuki Waki. "Estimation of Energy of Intracellular Movement and Apparent Viscosity by Magnetometry." In Advances in Biomagnetism, 469–72. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0581-1_100.

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Mohamad, N., M. A. Rosli, Siti Aishah Abdul Aziz, Saiful Amri Mazlan, Ubaidillah, Nur Azmah Nordin, Hafizal Yahaya, and Abdul Yasser Abd Fatah. "Intrinsic Apparent Viscosity and Rheological Properties of Magnetorheological Grease with Dilution Oils." In Proceedings of the 6th International Conference and Exhibition on Sustainable Energy and Advanced Materials, 171–80. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4481-1_17.

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Martinsson, Johan, Bjürn Glaser, and Du Sichen. "Study on Apparent Viscosity of Foaming Slag - Cold Model and High Temperature Experiments." In Advances in Molten Slags, Fluxes, and Salts, 431–38. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119333197.ch45.

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Kulkarni, A. D., and K. S. Wani. "Investigations on Recovery of Apparent Viscosity of Crude Oil After Magnetic Fluid Conditioning." In Proceedings of the 7th International Conference on Advances in Energy Research, 295–304. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5955-6_29.

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Martinsson, Johan, Björn Glaser, and Du Sichen. "Study on Apparent Viscosity of Foaming Slag - Cold Model and High Temperature Experiments." In Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016, 431–38. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-48769-4_45.

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Conference papers on the topic "Apparent Viscosity"

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Kawale, D., P. E. Boukany, M. T. Kreutzer, W. R. Rossen, and P. L. J. Zitha. "Contribution of Pore-Shape to the Polymer Apparent Viscosity." In SPE Asia Pacific Enhanced Oil Recovery Conference. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/174611-ms.

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Yang, Yuling, Yanjun Du, Ridong Fan, Mingli Wei, and Zuobo Chen. "Apparent Viscosity of Phosphate Dispersant-Amended Soil-Bentonite Backfills." In Geo-Shanghai 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413432.002.

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Xue, Y. Z., B. Lou, and W. Qian. "The research of model on the apparent viscosity of sludge." In International Symposium on Mechanical Engineering and Material Science (ismems-16). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/ismems-16.2016.63.

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Gera, Dinesh, and Yutaka Tsuji. "Effect of Apparent Solid’s Viscosity on the Hydrodynamics of Fluidized Beds." In ASME 1997 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/imece1997-0774.

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Abstract The dynamics of bubbles, the flow of gas and solids through the emulsion phase, and interchange of flowing gas between these two phases play a dominant role in heat transfer, mass transfer and solid-catalyzed chemical reactions. The pattern of gas flow through the bubbles has an effect on the degree of gas-solids contacting and under certain conditions a high degree of by-passing can occur. This research is aimed at understanding the aspects of bed hydrodynamics, especially to investigate the gas flow patterns inside the bubbles and solids’ mixing in a fluidized bed.
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Goel, Naval, Subhash N. Subhash, and Mahmoud Asadi. "A New Empirical Correlation to Predict Apparent Viscosity of Borate-Crosslinked Guar." In SPE Permian Basin Oil and Gas Recovery Conference. Society of Petroleum Engineers, 1998. http://dx.doi.org/10.2118/39816-ms.

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Sakai, Mikio, Yoshinori Yamada, Xiaosong Sun, Motoyuki Iijima, Yoshikatsu Tochigi, Hiroaki Fujiwara, Kouhei Otake, and Eiji Ochi. "Effect of Colloidal Particle behavior on the Apparent Viscosity of Molten Glass." In 14th Asia Pacific Confederation of Chemical Engineering Congress. Singapore: Research Publishing Services, 2012. http://dx.doi.org/10.3850/978-981-07-1445-1_107.

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Souza Mendes, Paulo R., Jose´ R. R. Siffert, and Eduardo S. S. Dutra. "Apparent Wall Slip in Capillary Rheometry of Viscoplastic Liquids." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79525.

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We employ a recently proposed viscosity function (Souza Mendes and Dutra, 2004) to analyze the fully developed flow of yield-stress liquids through tubes. We first show that its dimensionless form gives rise to the so-called jump number, a novel material property that measures the shear rate jump that the material undergoes as the yield stress is reached. We integrate numerically the momentum conservation equation that governs this flow together with the generalized Newtonian Liquid model and the above mentioned viscosity function. We obtain velocity and viscosity profiles for the entire range of the jump number. We show that the friction factor f.Re curves display sharp peaks as the shear stress value at the tube wall approaches the yield stress. Finally, we demonstrate the existence of sharp flow rate increases (or apparent slip) as the wall shear stress is increased in the vicinity of the yield stress.
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Guo, Liping, Tao Feng, Yang Liu, Xu Chen, Wenbo Li, and Jyh-Ping Hsu. "Characterization of a Water-in-Waxy Crude Oil Emulsion by its Steady Apparent Viscosity." In ASME 2019 Asia Pacific Pipeline Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/appc2019-7629.

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Abstract The rheological properties of water-in-waxy crude oil emulsion depend highly on its forming conditions. Among these, the steady apparent viscosity is capable of characterizing its degree of emulsification. Adopting waxy crude oil in the field, we examine the influence of the water cut, the stirring speed, and the stirring time on the steady apparent viscosity of the emulsions formed under various conditions in this study. A model based on the viscous flow entropy generated in emulsion preparation is applied to correlate the steady apparent viscosity with the key parameters. A regression model is constructed for the dependence of the steady apparent viscosity on the viscous flow entropy, the shear rate, the rheological parameters of blank crude oil, and the wax deposition volume.
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Zeynalli, Mursal, Emad W. Al-Shalabi, and Waleed AlAmeri. "An Extended Viscoelastic Model for Predicting Polymer Apparent Viscosity at Different Shear Rates." In SPE Annual Technical Conference and Exhibition. SPE, 2021. http://dx.doi.org/10.2118/206010-ms.

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Abstract Polymer flooding is one of the most commonly used chemical EOR methods. Conventionally, this technique was believed to improve macroscopic sweep efficiency by sweeping only bypassed oil. Nevertheless, recently it has been found that polymers exhibiting viscoelastic behavior in the porous medium can also improve microscopic displacement efficiency resulting in higher additional oil recovery. Therefore, an accurate prediction of the complex rheological response of polymers is crucial to obtain a proper estimation of incremental oil to polymer flooding. In this paper, a novel viscoelastic model is proposed to comprehensively analyze the polymer rheological behavior in porous media. The proposed viscoelastic model is considered an extension of the unified apparent viscosity model provided in the literature and is termed as extended unified viscosity model (E-UVM). The main advantage of the proposed model is its ability to capture the polymer mechanical degradation at ultimate shear rates primarily observed near wellbores. Furthermore, the fitting parameters used in the model were correlated to rock and polymer properties, significantly reducing the need for time-consuming coreflooding tests for future polymer screening works. Moreover, the extended viscoelastic model was implemented in MATLAB Reservoir Simulation Toolbox (MRST) and verified against the original shear model existing in the simulator. It was found that implementing the viscosity model in MRST might be more accurate and practical than the original method. In addition, the comparison between various viscosity models proposed earlier and E-UVM in the reservoir simulator revealed that the latter model could yield more reliable oil recovery predictions since it accommodates the mechanical degradation of polymers. This study presents a novel viscoelastic model that is more comprehensive and representative as opposed to other models in the literature.
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Kim, Jae Won, JaeMin Hyun, and Eun Young Ahn. "Flows in Rotation Cylinder Filled With Polymer Solutions." In ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/fedsm2006-98334.

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This investigation deals with the spin-up flows in a circular container of aspect ratio, 2.0. Shear front is generated in the transient spin-up process of the present flow system and it is propagating from the side wall to the central axis in a rotating container. Propagation of the shear front to the axis in a rotating container means the region behind the shear front acquires an angular momentum transfer from the solid walls. Propagating speed of the shear front depends on the apparent viscosity of polymer solution. Two kinds of polymer solutions are considered as a working fluid: one is CMC and the other is CTAB solution. CMC solution has larger apparent viscosity than that of water at the present applied shear stress, and CTAB shows varying apparent viscosities depending on the applied shear rates. Transient and spatial variations of the apparent viscosities of the present polymer solutions (CTAB and CMC) cause different propagating speeds of the shear front. In practice, CMC solution that has larger values of apparent viscosity than that of water always shows rapid approach to the steady state in comparison of the behavior of the flows with water. However, for the CTAB solution, the propagating speed of the shear front changes with the local magnitude of its apparent viscosity. Consequently, the prediction of Wedemeyer’s including viscosity in the propagating speed of the velocity shear front quantitatively agrees with the present experimental results.
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