Relevant bibliographies by topics / Bulkley

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Bulkley'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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

Select a source type:

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

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 "Bulkley"

1

CRASTER, R. V. "SOLUTIONS FOR HERSCHEL-BULKLEY FLOWS." Quarterly Journal of Mechanics and Applied Mathematics 48, no. 3 (1995): 343–74. http://dx.doi.org/10.1093/qjmam/48.3.343.

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

Klotz, James A., and William E. Brigham. "To Determine Herschel-Bulkley Coefficients." Journal of Petroleum Technology 50, no. 11 (November 1, 1998): 80–81. http://dx.doi.org/10.2118/52527-jpt.

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

Jing, Zefeng, Shuzhong Wang, and Zhende Zhai. "Effects of slip and rheological parameters on the flow and heat transfer of a Herschel-Bulkley fluid." International Journal of Numerical Methods for Heat & Fluid Flow 27, no. 4 (April 3, 2017): 981–99. http://dx.doi.org/10.1108/hff-07-2015-0271.

Full text
Abstract:
Purpose The purpose of this paper is to investigate the combined effects of slip and rheological parameters on the flow and heat transfer of the Herschel-Bulkley fluid. Design/methodology/approach The combinative dimensionless parameter method is introduced into the equations of the slip flow and heat transfer to make the discussion more comprehensive. More specifically, the slip and rheological parameters are transformed into the dimensionless slip number as well as Herschel-Bulkley number. We solve the dimensionless equations and then focus on the effects of these parameters on the slip flow and heat transfer. Findings The results show that, for a given value of Herschel-Bulkley number, there is a finite critical value of slip number at which the pressure gradient reaches the lowest value and both the dimensionless yield radius and slip velocity become 1. Meanwhile, the Nusselt number tends to be infinite at this critical value of slip number. For the case of slip, the Nusselt number also approaches infinity at a finite critical value of Herschel-Bulkley number. Furthermore, the dimensionless velocity as well as temperature of the yield pseudoplastic fluid with higher slip number is lower within a small radius but becomes higher near the wall. Meanwhile, from the velocity and temperature profiles, the effect of Herschel-Bulkley number on these two parameters of the Bingham fluid at the smaller radius is opposite. Originality/value These associated expressions can be generalized to the flow and heat transfer of a Herschel-Bulkley fluid under slip boundary condition. It can provide a reference for the engineering application relating to the heat transfer and flow of a Herschel-Bulkley fluid. Meanwhile, it also suggests some revelations for dealing with this similar problem.
APA, Harvard, Vancouver, ISO, and other styles
4

Zhu, Shi Xing, Xin Liu, and Li Ding. "Modeling and Analysis of Magnetorheological Fluid Damper under Impact Load." Advanced Materials Research 452-453 (January 2012): 1481–85. http://dx.doi.org/10.4028/www.scientific.net/amr.452-453.1481.

Full text
Abstract:
Modeling of a multi- ring grooves Magnetorheological（MR）fluid damper designed by ourselves were respectively carried out based on the Bingham model and the Herschel-Bulkley model. By comparing the simulation results of the two models with the true drop experimental result, it was proved that the Herschel-Bulkley model is in good accordance with the experiment and outperformed the Bingham model under high shear rate and high magnetic field. Furthermore, the parameter n in the Herschel-Bulkley model reflects the densification of the MR fluids, and by identifying and selecting the value of n better models and simulation results can be obtained.
APA, Harvard, Vancouver, ISO, and other styles
5

Alexandrou, Andreas N., Philippe Le Menn, Georgios Georgiou, and Vladimir Entov. "Flow instabilities of Herschel–Bulkley fluids." Journal of Non-Newtonian Fluid Mechanics 116, no. 1 (December 2003): 19–32. http://dx.doi.org/10.1016/s0377-0257(03)00113-7.

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

de Larrard, F., C. F. Ferraris, and T. Sedran. "Fresh concrete: A Herschel-Bulkley material." Materials and Structures 31, no. 7 (August 1998): 494–98. http://dx.doi.org/10.1007/bf02480474.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Gurjão, Flávio Farias, Gilmara Gurjão Carneiro, Taciano Pessoa, Débora Rafaelly Soares Silva, and Patricia Rodrigues Pê. "Comportamento reológico de iogurte de cajá comercializado em Campina Grande, Paraíba." Revista Verde de Agroecologia e Desenvolvimento Sustentável 10, no. 2 (December 31, 2015): 257–60. http://dx.doi.org/10.18378/rvads.v10i2.2939.

Full text
Abstract:
O estudo reológico contribui para o conhecimento da estrutura molecular, no controle de qualidade e aceitação de um determinado produto, auxilia no controle do processo industrial e em projetos de equipamentos no processamento dos materiais. Objetivou-se avaliar o comportamento reológico de iogurte de cajá e a adequação dos dados reológicos aos modelos de Ostwald-de-Waele, Herschel-Bulkley e Mizrahi-Berk e ainda o efeito da temperatura sobre o comportamento reológico. Os dados reológicos foram obtidos através de um viscosímetro Brookfield DV-II+Pro. Os ensaios foram realizados nas temperaturas 20, 30 e 40 °C e os resultados experimentais foram ajustados pelos modelos de Ostwalde-de-Waelle, Casson, Hershel Bulkey e Mizrahi-Berk, com auxílio do software STATISTICA, versão 7.0. O iogurte analisado neste experimento apresentou comportamento de fluido não newtoniano com características pseudoplástica. Os modelos reológicos de Hershel Bulkey e Mizrahi-Berk representaram satisfatoriamente o comportamento reológico do iogurte de cajá nas diferentes temperaturas estudadas, apresentando coeficientes de correlação (R²), acima de 0,99. Rheological properties of yogurt cajá marketed in Campina Grande, state ParaíbaAbstract: The rheological study contributes to the knowledge of the molecular structure, the quality control and acceptance of a particular product, helps to control the manufacturing process and equipment designs in the processing of materials. This study aimed to evaluate the rheological behavior of yogurt cajá and the adequacy of the rheological data to models of Ostwald-de-Waele, Herschel-Bulkley and Mizrahi-Berk still the effect of temperature on the rheological behavior. The rheological data were obtained using a Brookfield DV-II + Pro. Assays were carried out at temperatures 20, 30 and 40 °C and the experimental results were adjusted by the model-to-Ostwalde Waelle, Casson and Herschel Bulkey Mizrahi-Berk, using the STATISTICA software, version 7.0. The yogurt analyzed in this experiment showed behavior of pseudoplastic non-Newtonian fluid characteristics. The rheological models Hershel Bulkey and Mizrahi-Berk satisfactorily represented the rheological behavior of the hog plum yogurt at different temperatures studied, with correlation coefficients (R²) above 0.99.
APA, Harvard, Vancouver, ISO, and other styles
8

Sherwood, J. D., and D. Durban. "Squeeze-flow of a Herschel–Bulkley fluid." Journal of Non-Newtonian Fluid Mechanics 77, no. 1-2 (May 1998): 115–21. http://dx.doi.org/10.1016/s0377-0257(97)00099-2.

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

Malin, M. R. "Turbulent pipe flow of Herschel-Bulkley fluids." International Communications in Heat and Mass Transfer 25, no. 3 (April 1998): 321–30. http://dx.doi.org/10.1016/s0735-1933(98)00019-0.

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

Hassan, M. A., Manabendra Pathak, and Mohd Kaleem Khan. "Rayleigh–Benard convection in Herschel–Bulkley fluid." Journal of Non-Newtonian Fluid Mechanics 226 (December 2015): 32–45. http://dx.doi.org/10.1016/j.jnnfm.2015.10.003.

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

Dissertations / Theses on the topic "Bulkley"

1

Bronson, Elizabeth Anne. "Openings in the forest economy : a case study of small forest operators in the Bulkley Valley, BC, Canada." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0019/NQ48610.pdf.

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

Clain, Xavier. "Une étude expérimentale de l'injection de fluides d'Herschel-Bulkley en milieu poreux." Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00582324.

Full text
Abstract:
L'écoulement à travers un milieu poreux d'un fluide non newtonien, est un problème récurrent rencontré dans de nombreux domaines de l'industrie et dont la difficulté réside à la fois dans la géométrie complexe du milieu poreux et dans le caractère non-linéaire des matériaux utilisés. Dans cette thèse, nous adoptons une approche différente de celle menée dans les travaux antérieurs, en nous basant principalement sur l'expérimentation. En procédant à des essais systématiques d'injection dans un milieu poreux dont nous pouvons contrôler les données géométriques, nous montrons qu'un gradient de pression seuil, étant proportionnel au seuil du fluide et inversement proportionnel à la taille typique des pores, doit systématiquement être dépassé pour mettre le fluide en écoulement.En outre, nous étudions la possibilité de regrouper, via un redimensionnement, l'ensemble des résultats sur une courbe maîtresse et établir ainsi une base pour l'établissement d'une loi générale d'écoulement
APA, Harvard, Vancouver, ISO, and other styles
3

Laruccia, Moacyr Bartholomeu. "Numerical modelling of non-Newtonian fluids in annular space and its application to drilling operations." Thesis, Heriot-Watt University, 1995. http://hdl.handle.net/10399/1324.

Full text
Abstract:
This thesis presents the results of investigations in two areasA) Laminar helical flow of Herschel Bulkley fluids in annular space; and B) Cuttings transport in deviated wellbores. Description of area A: This is a theoretical study that consists of the modelling of non-Newtonian fluid flowing through annular space. The rheology of the fluid is represented by a three-parameter fluid model to account for a non-linear behaviour of the rheologic curve followed by the presence of a yield stress. Two distinct methodologies were used to study the effects of inner pipe rotation and inner pipe eccentricity on the velocity profiles of the annular flow. I. Laminar Helical Flow of a Herschel-Bulkley Fluid in a Concentric Annulus and its Extension to a Narrow Eccentric Annulus: The method consists of the use of the boundary conditions to enable the numerical integration of the motion equation. The subsequent extension to eccentric annuli is based on division of the annulus into sectors, where each sector is treated as an equivalent sector of a concentric annulus. Profiles of velocity presented in 2-D and 3-D contour plots explain the effects of eccentricity, inner pipe rotation and yield stress in many different situations. This analysis is useful to simulate the flow field in a borehole during directional drilling and primary cementing particularly for narrow eccentric annuli. II. Laminar Helical Flow of a Herschel-Bulkley Fluid in an Eccentric Annulus and The Special Case of a Pure Axial Flow: A new methodology to obtain the governing equations is proposed here as a first step to the solution of this complicated problem. It consists of eliminating the unknown radial and tangential pressure gradients from the equation of motion by defining vorticity between these two components of the velocity vector. The vorticity equation and the remaining axial component of the motion equation, written in bipolar co-ordinates, are then made discrete using two different finite difference approaches. Firstly, the inertial terms of both equations are made discrete using a modified upwind scheme proposed by O. Axelsson and I. Gustafsson, while the viscous terms are made discrete using central difference approximation. Secondly, the moving boundary conditions are set by enforcing continuity of pressure on the inner annular wall. The future solution of these equations will provide a very accurate model, unavailable until now, that accounts for both effects, the eccentricity and rotation of the drill string, to simulate the flow field of drilling mud in directional and horizontal wells. Description of area B: The fluid models developed are incorporated in the development of two semi-empirical correlations to predict the critical conditions of cuttings transport in deviated weI/bore. The numerical fluid models are modified to predict the velocity of the fluid at the vicinity of the cutting that is at the point of being transported. An extensive bank of data of the critical conditions of transport, emulating many different field conditions, was used in this analysis. The experimental data was provided by an industry sponsored project which did four years of experimental work in a simulated testing column to generate the data. The two semi-empirical correlations developed in this research are based on: • a dimensional analysis of the variables involved in two distinct mechanisms of transport experimentally observed: 1. Rolling or Sliding and 2. Suspension; • a force balance applied to a cutting resting on the low-side wall of an inclined annulus, under fluid dynamic conditions. The semi-empirical correlations can be used as general criteria for evaluating and correlating the effects of various parameters on cuttings transport, and as a guideline for cuttings transport programme design during directional drilling.
APA, Harvard, Vancouver, ISO, and other styles
4

Seyidoglu, Tijen. "Generalized Couette Flow Of A Herschel-bulkley Fluid Through Eccentric Annulus-an Approximate Solution." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607087/index.pdf.

Full text
Abstract:
ABSTRACT GENERALIZED COUETTE FLOW OF A HERSCHEL - BULKLEY FLUID THROUGH ECCENTRIC ANNULUS - AN APPROXIMATE SOLUTION Seyidoglu, Tijen M.S., Department of Chemical Engineering Supervisor: ismail Tosun Co-Supervisor: Ahmet N. Eraslan January 2006, 134 pages Generalized Couette flow of a Herschel-Bulkley fluid in an eccentric annulus is analyzed by approximating the flow geometry as a slit of variable height. Besides an imposed pressure gradient, one of the plates is considered non-stationary to take into account the axial and/or angular motion of the inner pipe in an eccentric annulus system. Depending on the magnitude and the direction of the applied pressure gradient with respect to the plate velocity, three separate flow cases are studied in which the velocity reaches its maximum value either within the plug flow region or at the moving boundary. Velocity distributions are obtained for each case by solving the equations of continuity and motion. Volumetric flow rate expressions are obtained by integrating the velocity distribution over the cross-sectional area. At a given pressure gradient, the results indicate an increase in volumetric flow rate with an increase in eccentricity ratio. Criteria for each flow type is developed in terms of a dimensionless parameter &
#923
, which takes into account the ratio of the imposed pressure gradient to the plate velocity. Volumetric flow rate expressions for Newtonian, Bingham and power-law fluids are obtained by considering the limiting values of the fluid index and yield stress. The validity of the equations are checked by considering the slit height to be a constant, i.e., flow between parallel plates. Surge/swab pressure calculations are carried out for Herschel-Bulkley, power-law and Bingham fluids and the results are expressed as a function of eccentricity ratio, radius ratio, fluid index and yield stress. The results indicate that when the fluid index and the eccentricity ratio are fixed, a slight increase in the radius ratio causes a tremendous increase in surge/swab pressure, especially for low values of fluid index. On the other hand, displacement of the inner pipe from a concentric position causes a decrease in swab/surge pressure when other parameters are held constant. Comparison with the literature values reveals the fact that flow in an eccentric annulus can be modeled as flow between a slit of variable height as long as the radius ratio is greater than 0.5 and the eccentricity ratio is less than 0.3. The results for other values of radius ratio and eccentricity ratio can be used as initial guess values in carrying out numerical calculations.
APA, Harvard, Vancouver, ISO, and other styles
5

Moudachirou, Idriss. "Transfert thermique et perte de charge pour un fluide de Herschel-Bulkley thermo-dépendant." Nancy 1, 1992. http://www.theses.fr/1992NAN10226.

Full text
Abstract:
On se propose d'étudier numériquement et expérimentalement des lois de l'écoulement et du transfert de chaleur pour des fluides non newtoniens thermodépendants, en écoulement laminaire dans une conduite cylindrique de section circulaire, chauffées à la paroi à densité de flux de chaleur. On s'intéresse aux fluides pseudoplastiques dont le comportement peut être modélisé par la loi de Marschel-Bulkley. On met clairement en évidence l'incidence d'un champ thermique imposé sur la distribution des vitesses, sur les lois de perte chargé et sur les lois de transfert de chaleur qui en résultent. Outre les paramétrés classiques, on propose pour le coefficient de frottement et le coefficient d'échange de chaleur des corrélations
APA, Harvard, Vancouver, ISO, and other styles
6

Vieira, Adriana Silveira [UNESP]. "Um panorama sobre roll waves em escoamentos laminares e turbulentos com superfície livre." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/88890.

Full text
Abstract:
Made available in DSpace on 2014-06-11T19:23:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-12-07Bitstream added on 2014-06-13T19:50:38Z : No. of bitstreams: 1 vieira_as_me_ilha.pdf: 1217264 bytes, checksum: cb21063aba699b564242c2fc4b3c3ed4 (MD5)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Os escoamentos na superfície livre que se processam sobre forte declividade podem desenvolver instabilidades ao cabo de tempo finito. Tais instabilidades aparecem sob formas de ondas tipo “hydraulic jumps” bem espaçados e são denominadas Roll Waves. Estas ondas, longas e periódicas, podem ser contínuas ou descontínuas; contínuas em problema Shallow Water viscoso e descontínuas para o caso não viscoso. Tal fenômeno pode ser observado tanto em escoamentos naturais como em canais artificiais e vertedouros de barragens. Tratando-se de escoamento de Fluidos não newtonianos, tal fenômeno pode ser visto facilmente em lavas torrenciais, avalanchas ou “debris flows”. Nesta dissertação foram analisados matematicamente e numericamente o comportamento e as condições de existência para a formação de Roll Waves em escoamentos laminares e turbulentos. Em escoamentos turbulentos toma-se como referência os trabalhos realizados por Maciel (2001) numa reologia Binghamiana. Para escoamentos laminares, cita-se o trabalho de Mei (1994) em uma reologia tipo Power Law. No plano numérico, para escoamentos turbulentos, foram utilizadas rotinas do MATLAB® versão 6.5 e, para escoamentos laminares, rotinas em FORTRAN 90; onde pôde-se analisar e comparar resultados para diversas reologias. O foco desta dissertação foi tratar o problema Roll Waves como uma instabilidade na vizinhança do regime uniforme para Fluidos não newtonianos, em regimes turbulentos e laminares. A reologia tratada e representativa de diversos escoamentos na natureza foi a de Herschel Bulkley. A partir desta dissertação deixa-se, como perspectiva futura, um estudo mais aprofundado sob formação de ondas em fluidos hiperconcentrados tipo Herschel Bulkley com abordagem experimental a fim de validar resultados apontados nesta pesquisa.
Flows that happen over strong slope with free surface can develop instabilities after some finite time. Such wave shaped instabilities appear in the flow and are of the type “hydraulic jumps” well spaced and they are called Roll Waves. Those waves are long and periodic, continuous or discontinuous, continuous in viscous Shallow Water problems, and discontinuous for the inviscid case. Roll Waves are uncommon in natural flows, but they are common in man made channels and dams spillway. For flows of non Newtonian fluids such phenomenon can be seen easily in lava torrent, avalanche and debris flow. In this work it were mathematically and numerically analyzed the behavior and the existence conditions for the generation of Roll Waves within laminar and turbulent flows. For turbulent flows it is taken as reference the works done by Maciel (2001) dealing with a Bingham rheology. For laminar flows the reference is the work done by Mei (1994) using a Power Law rheology. Numerically, for turbulent flows it were used MATLAB® 6.5 procedures and for laminar flows FORTRAN 90 procedures were developed. Using these reference procedures it was obtained compared and analyzed results for several rheologies. This work left as future perspective a deeper study about the generation of waves in hipper concentrated fluids such as Herschel Bulkley fluid, with an experimental approach aiming to validate results produced. The focus of this work was to treat the so called Roll Waves problem as an instability in the vicinity of the uniform flow regime for non Newtonian fluids under laminar and turbulent flow regimes. The Herschel Bulkley rheology that was treated in this work is representative of several flows that happen in nature.
APA, Harvard, Vancouver, ISO, and other styles
7

Vayssade, Anne-Laure. "Flows of Herschel-Bulkley fluids in confined environments : applications to the cementing of oil wells." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066214/document.

Full text
Abstract:
En 2010, la plus grande catastrophe de l’histoire de l’industrie pétrolière s’est produite dans le golfe du Mexique avec l’explosion du puit de pétrole Macondo. Les causes de l’accident sont connues : la couche de ciment dans l’espace annulaire du puit qui est supposée empêcher les fuites, a cédé. Ces fuites sont dues à la présence de boue (la boue est utilisée lors du forage du puit avant sa cimentation) dans l’annulaire dégradant la prise du ciment. Nous utilisons la microfluidique afin d’étudier la question des films de boue qui restent sur les parois de l’annulaire. Le ciment et la boue sont modélisés par des suspensions de microgel qui ont des propriétés rhéologiques similaires. Des nombres sans dimension comparables entre la microfluidique et la situation réelle permettent d’extraire de cette étude des informations pertinentes pour l’industrie pétrolière. Nous menons des expériences de déplacements de suspensions de microgel par d’autres fluides et nous mesurons l’évolution de l’épaisseur du film laissé derrière l’interface en fonction du temps et de la vitesse de l’interface. Nous testons différentes géométries dans lesquelles les propriétés de surface sont modifiées afin d’empêcher ou de permettre le glissement des fluides dans le système. Nous montrons que le glissement est un paramètre crucial de l’expérience. De plus, nous avons aussi étudié l’écoulement de fluides de Herschel-Bulkley en systèmes confinés. Cette étude a mis en évidence un nouvel effet associé à une longueur caractéristique qui n’avait pas encore été mentionnée dans la littérature. Cette étude fondamentale révèle la richesse de la dynamique des fluides de Herschel-Bulkley
In 2010, in the Gulf of Mexico, the blow out of the Macondo well was the largest accident in the history of the petroleum industry. It appeared clearly that the cement sheath in the annular gap of the well that is supposed to hinder leakages failed. Leakages are due to the presence of mud (the mud is used during the well fabrication) in the annular gap that damage cement hardening. We use the microfluidic tool to address the question of the mud film left in the annular gap during the cementing process. The cement and the mud will be modelled by microgel suspensions, which turn out to have similar rheological characteristics. Important dimensionless numbers can be made comparable so that useful information can be extracted from studies performed in microfluidic environments. We perform experiments in which we displace microgel suspensions by another fluid. We image the film left behind the finger and we observe its evolution over time and as a function of the front velocity. Various geometries are tested in which the walls chemistry are tuned to allow or prevent slippage. We show that slippage is a crucial parameter of the experiments. Additionally to this approach, we have also performed a study on the flow of Herschel-Bulkley fluids in confined systems. This study revealed a novel effect associated to a characteristic length that has not been reported before. This fundamental study reveals the richness of Herschel-Bulkley flow dynamics
APA, Harvard, Vancouver, ISO, and other styles
8

Patarin, Jeremy. "Rhéologie de suspensions hétérogènes concentrées : applications aux bols alimentaires et aux jus gastriques d'aliments solides." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENI103/document.

Full text
Abstract:
L'enjeu des travaux contenus dans cette thèse est la caractérisation rhéologique de suspensions concentrées d'objets viscoplastiques suspendus dans une matrice viscoplastique. Trois contraintes physiques se présentent : l'hétérogénéité des objets, la taille des objets au regard de la taille du système étudié, et la proximité entre la consistance de la phase suspendante et celle des objets. Dans notre contexte alimentaire, il faut ajouter des contraintes d'ordre biologique : les faibles durées de vie des produits, les prélèvements in vivo et la conservation des conditions de températures et d'humidité. L'ensemble de ces contraintes aboutit à une rhéométrie spécifique, aux frontières de la mécanique des milieux continues, avec pour objectif de mesurer des propriétés rhéologiques pertinentes. Pour cela, deux instrumentations originales ont été construites pour effectuer la caractérisation rhéologique le plus vite et au plus près de la génération des échantillons.Appliquée aux bols alimentaires issus de fromage, leur rhéologie vient gouverner les écoulements en bouche et induire la création de surface d'échange en bouche, au travers de la mastication. Au travers de ces interfaces, les arômes et les sapides sont libérés et transportés vers les récepteurs sensoriels. Les résultats montrent le lien entre le seuil de contrainte à l'écoulement du bol et la libération d'arômes de différents hydrophobicités, fonction de la fermeté et du taux de matières grasses du fromage. Plus particulièrement, la phase suspendante fluide, semble jouer un rôle majeur dans la création et la persistance des surfaces d'échanges. Appliquée aux jus gastriques issus de pain, l'enjeu est de savoir si des modifications des contenus en glucides pouvaient impacter la rhéologie des jus gastriques, modifier les cinétiques de vidange en sortie d'estomac, et diminuer l'excursion glycémique. Les résultats montrent l'effet d'un ajout d'amylose sur l'augmentation de la viscosité aux temps de digestion longs, lorsque la rhéologie n'est plus gouvernée par l'encombrement des particules de pain gonflées d'eau. Cependant, l'amylose ne semble pas avoir d'impact sur les cinétiques de vidange, ce qui vient conforter que le débit en sortie d'estomac est régulé par la charge énergétique contenue dans le repas
The challenge of this work is to carry out the rheological characterization of concentrated suspensions of viscoplastic objects suspended in a viscoelastic matrix. Three structural constraints are faced: the heterogeneity of the particles, the size of particle in relation to the size of the whole system studied, and the proximity between the consistency of the suspending phase and that the consistency of the particles. In the food context, some biological constraints are added: small lifetimes of bolus, in vivo sampling and test conditions of temperature and humidity. All these constraints lead to a compromise in rheometry, at the edge of continuum mechanics, aiming to measure useful rheological properties. To carry out the rheological characterizations quickly and efficiently, two original devices has been designed trough this work. Applied to food bolus from cheese, rheology comes to govern flows in the mouth and induce the creation of exchange area in the mouth, during the chewing process. Through these interfaces, the savors and flavors are released and transported to the sensory receptors. The results show the relationship between the yield stress of the bolus and flavors release of different hydrophobic aromas, depending on the firmness and fat content of the cheeses. Specifically, fluid suspending matrix appears to play a major role in the creation and persistence of exchange area.Applied to gastric juice from bread, the issue is whether changes in carbohydrate content could impact the rheology of gastric juice, modify the kinetics of stomach flow rate, and decrease the glycemic excursion. The results show the effect of amylose addition on increasing the viscosity for long digestion time, when the rheology is no longer governed by the jamming effect of the particles made of water-swollen bread. However, amylose does not seem to have any impact on the kinetics of emptying, which reinforces that the stomach flow rate is regulated by the caloric charge contained in the meal
APA, Harvard, Vancouver, ISO, and other styles
9

Machado, Fernando Machado. "Aproximação de Galerkin mínimos-quadrados de escoamentos axissimétricos de fluido Herschel-Bulkley através de expansões abruptas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/11964.

Full text
Abstract:
O estudo de escoamentos de fluidos não-Newtonianos através de expansões desperta um grande interesse em pesquisadores nas diversas áreas da engenharia, devido a sua ampla aplicação em indústrias e no meio acadêmico. O objetivo principal desta Dissertação é simular problemas de escoamentos envolvendo fluidos viscoplásticos através de expansões axissimétricas abruptas. O modelo mecânico empregado é baseado nas equações de conservação de massa e de momentum para escoamentos isocóricos acoplados com a equação constitutiva de um Fluido Newtoniano Generalizada (GNL), com a função de viscosidade de Herschel-Bulkley regularizada pela equação de Papanastasiou. O modelo mecânico é aproximado por um modelo estabilizado de elementos finitos, denominado método Galerkin Mínimos-Quadrados, ou Galerkin Least-squares (GLS). Esse método (GLS) é usado a fim superar as dificuldades numéricas do modelo de Galerkin clássico: a condição de Babuška-Brezzi e a instabilidade inerente em regiões advectivas do escoamento. O método é construído adicionando termos de malha-dependentes a fim aumentar a estabilidade da formulação de Galerkin clássica sem danificar sua consistência. A formulação GLS é aplicada para estudar a influência do índice power-law, da tensão limite de cisalhamento e razão de aspecto na dinâmica do escoamento de fluidos de Herschel-Bulkley através de expansões axissimétricas abruptas de razão de aspecto 1:2 e 1:4. Os problemas que envolvem números de Reynolds desprezíveis, para uma escala do número de Herschel-Bulkley entre 0 e 100 e índice de comportamento entre 0,2 e 1,0 são apresentados. Os resultados são fisicamente detalhados e estão de acordo com a literatura.
The study of non-Newtonian fluid flows in expansions is of great interest for researchers in the several branches of engineering, due to their wide application both in industry and academy. The objective of this Dissertation is to simulate flow problems involving a viscoplastic fluid through an axisymmetric abrupt expansion. The mechanical model employed is based on the mass and momentum conservative equations for isochoric flows coupled with the Generalized Newtonian Liquid (GNL) constitutive equation, with the Papanastasiou-regularized Herschel-Bulkley viscosity function. The mechanical model is approximated by a stabilized finite element scheme, namely the Galerkin Least-squares method. This method (GLS) is used in order to overcome the numerical difficulties of the classical Galerkin method: the Babuška- Brezzi condition and the inherent instability in advective flow regions. The method is built adding mesh-dependent terms in order to increase the stability of the classical Galerkin formulation without damaging its consistency. The GLS formulation is applied to study the influence of power-law index, yield stress and aspect reason in the flow dynamics of Herschel- Bulkley fluids through an axisymmetric abrupt expansions of aspect reason 1:2 and 1:4. Problems involving negligible Reynolds numbers, for a Herschel-Bulkley number range between 0 and 100 and e power-law index range between 0.2 and 1.0 are presented. The results are physically comprehensive and are in accordance with the literature.
APA, Harvard, Vancouver, ISO, and other styles
10

Javaherdeh, Koroush. "Transfert thermique pour fluides non-newtoniens : cas du refroidissement de fluides de Herschel-Bulkley : aspects instationnaires." Nancy 1, 1996. http://www.theses.fr/1996NAN10174.

Full text
Abstract:
Nous nous proposons d'effectuer une étude numérique et expérimentale du refroidissement avec changement de phase, en régime instationnaire. Nous déterminons les lois de l'écoulement et du transfert de chaleur, pour des fluides non-newtoniens thermodépendants à seuil. Ces fluides s'écoulent dans une conduite cylindrique horizontale, refroidie à la paroi par l'écoulement externe tel que coefficient d'échange convectif soit uniforme. Nous nous intéressons aux fluides viscoplastiques dont le comportement peut être modélisé par la loi de Herschel-Bulkley. D'un point de vue numérique, nous avons utilisé deux formulations (ω-Ψ) et (u-v-p) pour résoudre les équations gouvernant le problème. La similarité des résultats obtenus nous a permis de privilégier la formulation (u-v-p). De plus, nous avons mis en évidence l'incidence de divers paramètres sur la structure du champ dynamique et sur le transfert de chaleur. Sur le plan expérimental, nous avons utilisé une boucle d'essais fonctionnant en circuit fermé, Au cours de nos essais nous avons mesuré divers paramètres tels que: débits, températures et épaisseur du dépôt solide. Pour obtenir une caractérisation rhéologique précise de notre produit, nous avons utilisé un rhéomètre à contrainte imposée. Notre recherche nous a permis de mettre en évidence l'influence du coefficient d'échange externe (h∞), de la température du fluide réfrigérant (T∞), de la température d'entrée du fluide de travail (Te) du débit (Q), du paramètre de thermodépendance (bk ) sur les champs thermique et dynamique et d'établir des corrélatons pour le coefficient de frottement et le nombre de Nusselt
We present here a numerical and experimental study of cooling with phase change taking account of time evolution. We have determined the dynamical and the heat transfer laws for non Newtonian thermodependent yield stress fluids in laminar regime, flowing through cylindrical duct. These thermodependant fluids are subjected to an external cooling with a constant heat transfer coefficient. We are interested in viscoplastic products for which the comportment law may be modelized by the formula. To solve numerically the governing equations, we have used (ω-Ψ) and (u-v-p) formulations. The similarity of the results permits to privilege the (u-v-p) formulation. Experimentally, we have used a closed test loop to determine different parameters like: flow rate, wall temperatures, thickness of solid deposit. A stress controlled rheometer was used to obtain a precise determination of the rheological behaviour. Our research permits to point out the influence of: the external heat transfer coefficient (h ∞), the temperature of cold fluid(T∞), the temperature of the fluid at inlet (Te) the flow rate (Q) and also of the thermodependancy parameter (bk ) on the thermal and dynamical fields
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Bulkley"

1

Taylor, Thomas. From Bulkeley to Bulkley to Buckley: The ancestors and descendants of Moses Bulkley (1727-1812). United States?: Xlibris, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

), Interagency Planning Team (B C. Bulkley Land and Resource Management Plan. British Columbia: The Board, 1998.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Sessions, William K. Stephen Bulkley: Newcastle's first "long-stay" printer. [York: Ebor?], 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Blaney, Charlotte Raye. The ancestors and descendants of Lucius Duncan Bulkley. Sherborn, Mass. (11 Hollis St., Sherborn 01770): C.R. Blaney, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Sessions, William K. Stephen Bulkley: Peripatetic royalist printer of London-York-Newcastle-Gateshead-Newcastle & York, who died in 1680, and his son John Bulkley who died in 1695. York: Ebor Press, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Sessions, William K. Stephen Bulkley: Peripatetic royalist printer of London, York, Newcastle, Gateshead, Newcastle & York, who died in 1680 : and his son John Bulkley, who died in 1695. York: Ebor Press, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Bulkley (Stephen & John) & Broad (Thomas & Alice), White (John I of York) & Wayt (Thomas). York: Ebor, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Sessions, William K. Bulkley (Stephen & John) & Broad (Thomas & Alice), White (John I of York) & Wayt (Thomas). York, England: Ebor Press, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Lyon, Leonard P. The descendants of Samuel Lyon of Saratoga County, New York: With genealogical notes on related names, Betts, Bulkley, Coggeshall, Dunlop, Edwards, Evans, Jennings, Kimberly, Meeker, Olmstead, Roundy, Scherer, Treadwell, Turney, Wheeler, and mention of others. Arlington, Va. (3817 7th St. So., Arlington 22204): L.P. Lyon, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Rouillé, Joseph. Le temps des amazones: Madame Bulkeley, Vendée 1793. Saint Gilles Croix de Vie [France]: Echos du Passé, 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Bulkley"

1

Parish, Lawrence Charles. "Lucius Duncan Bulkley." In Pantheon of Dermatology, 135–39. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-33224-1_23.

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

Paris, Lawrence Charles. "Lucius Duncan Bulkley (1845–1928)." In Pantheon der Dermatologie, 124–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-34093-5_22.

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

Belblidia, F., T. Haroon, and M. F. Webster. "The Dynamics of Compressible Herschel—Bulkley Fluids in Die-Swell Flows." In Damage and Fracture Mechanics, 425–34. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2669-9_45.

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

Grue, Ragnhild Håøy, Dieter Issler, Jean-Sébastien L’Heureux, and Vikas Thakur. "Viscometric Tests of Sensitive Clay from Byneset, Norway, and Fit to the Herschel–Bulkley Model." In Landslides in Sensitive Clays, 155–66. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56487-6_14.

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

Nouar, C. "Numerical and Experimental Investigation of Thermal Convection for Thermodependent Herschel-Bulkley Fluid in an Annular Duct with Rotating Inner Cylinder." In Progress and Trends in Rheology V, 297–98. Heidelberg: Steinkopff, 1998. http://dx.doi.org/10.1007/978-3-642-51062-5_138.

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

Gooch, Jan W. "Core-Bulked Yarn." In Encyclopedic Dictionary of Polymers, 172. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_2938.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Catton, C. "Radiotherapy for Bulky Seminoma." In Carcinoma of the Kidney and Testis, and Rare Urologic Malignancies, 279–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-59839-5_21.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Banerjee, Susanta, and Debaditya Bera. "Polycondensation Materials Containing Bulky Side Groups." In Membrane Materials for Gas and Vapor Separation, 223–69. Chichester, UK: John Wiley & Sons, Ltd, 2017. http://dx.doi.org/10.1002/9781119112747.ch7.

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

Mathiasch, B. "By Reactions with Bulky Organometallic Reagents." In Inorganic Reactions and Methods, 88–89. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145234.ch55.

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

Javadpour, N. "Management of Bulky Advanced Disseminated Testicular Cancer." In Testicular Cancer and Other Tumors of the Genitourinary Tract, 219–30. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2453-9_25.

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

Conference papers on the topic "Bulkley"

1

Iqbal, Tasib, and Maryiam Javed. "Effect of heat transfer on the flow of herschel-bulkley fluid in a compliant channel with peristalsis: Peristaltic transport of herschel-bulkley fluid." In 2018 15th International Bhurban Conference on Applied Sciences and Technology (IBCAST). IEEE, 2018. http://dx.doi.org/10.1109/ibcast.2018.8312295.

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

Lafforgue, Olivier, Isabelle Seyssiecq, Sebastien Poncet, Julien Favier, and Laurent Morin. "A Time-dependent Herschel-Bulkley Model for Synthetic Bronchial Mucus." In Canadian Society for Mechanical Engineering International Congress (2020 : Charlottetown, PE). Charlottetown, P.E.I.: University of Prince Edward Island. Robertson Library, 2020. http://dx.doi.org/10.32393/csme.2020.1253.

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

Letelier, Mario F., Juan S. Stockle, and Dennis A. Siginer. "An Inverse Approach to Magnetorheological Damper Design: Hershel-Bulkley Model." In ASME 2008 Fluids Engineering Division Summer Meeting collocated with the Heat Transfer, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. ASMEDC, 2008. http://dx.doi.org/10.1115/fedsm2008-55058.

Full text
Abstract:
Magnetorheological fluids (MRF) are increasingly used for the design of dampers in many cases when a given response is critical for desired performance. Some recent examples are self-powered magnetorheological dampers, cable vibration control and wheeled vehicle dampers. Loads of this type can be very big, especially in the case of seismic-dampers as well as in heavy vehicles and aircraft landing gear. This problem can be more efficiently dealt with by using an inverse-problem strategy, where the required performance is specified a priori, and the fluid parameters are changed accordingly by means of a variable magnetic field. The effect on the flow of the time-variation of the parameters of the Herschel-Bulkley constitutive model is analyzed in this paper. In this way, the influence of a varying magnetic field on the unsteady flow of a magnetic fluid is explored. Yield stress, viscosity and power index are assumed time-dependent. In particular, linear variations in time of these parameters are considered, and the case where the yield stress and viscosity oscillate in time is explored in detail. The characteristics of the velocity field are analyzed for different values of the constants that determine the time structure of the constitutive parameters.
APA, Harvard, Vancouver, ISO, and other styles
4

Ashrafi, Nariman, Ali Sadeghi, Armin Chegini, and Mehdi Shafahi. "Herschel-Bulkley Fluid Flow Characteristics in a Duct With an Obstacle." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-87092.

Full text
Abstract:
This study is focused on the flow of the shear thinning and shear thickening fluids of Herschel-Bulkley type past a partial vertical wall in between the plates. Upon numerically solving the continuity and momentum equations the flow is analyzed throughout the domain using a finite volume scheme. The shear stress at the wall together with velocity distribution are evaluated and compared to experimental results for several values of Herschel-Bulkley coefficients for fluidity and flow behavior index. Dynamic viscosity and other flow variables are calculated throughout the flow domain.
APA, Harvard, Vancouver, ISO, and other styles
5

Letelier, Mario F., Dennis A. Siginer, Felipe Godoy, and César Rosas. "Herschel-Bulkley Viscoplastic Flow in Tubes of Non-Circular Cross-Section." In ASME 2016 Fluids Engineering Division Summer Meeting collocated with the ASME 2016 Heat Transfer Summer Conference and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/fedsm2016-1069.

Full text
Abstract:
Flow of a Herschel-Bulkley (H-B) fluid in tubes of non-circular cross-section in investigated analytically. This study complements results presented in [1] where the equation of motion was solved in tubes of arbitrary cross-section for Bingham type of fluids, and the shapes of plug zones centered on the tube axis and stagnant zones attached to the corners were predicted when the cross-section is triangular and square. In this paper we investigate the effect of the power index in the H-B model on the flow for values greater and lesser than unity, considering thus the shear-thinning and shear-thickening effects, which could not be accounted for with the Bingham model. The equation of motion is solved when the cross-section is an equilateral triangle or a square by means of the shape factor method previously introduced in [2]. Thus, shear-thickening and shear-thinning effects are accounted for and related to the tube geometry in predicting the existence and the extent of undeformed regions in the flow field.
APA, Harvard, Vancouver, ISO, and other styles
6

Hong, Sung-Ryong, Shaju John, and Norman M. Wereley. "Quasi-Steady Herschel-Bulkley Analysis of Magnetorheological Dampers With Preyield Viscosity." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-82593.

Full text
Abstract:
A magnetorheological (MR) fluid, modeled as a Bingham-plastic material, is characterized by a field dependent yield stress, and a (nearly constant) postyield plastic viscosity. Based on viscometric measurements, such a Bingham-plastic model is an idealization to physical magnetorheological behavior, albeit a useful one. A better approximation involves modifying both the preyield and postyield constitutive behavior as follows: (1) assume a high viscosity preyield behavior over a low shear rate range below the yield stress, and (2) assume a power law fluid (i.e., variable viscosity) above the yield stress that accounts for the shear thinning behavior exhibited by MR fluids above the yield stress. Such an idealization to the MR fluid’s constitutive behavior is called a viscous-power law model, or a Herschel-Bulkley model with preyield viscosity. This study develops analytical quasi-steady analysis for such a constitutive MR fluid behavior applied to a flow mode MR damper. Closed form solutions for the fluid velocity, as well as key performance metrics such as damping capacity and dynamic range (ratio of field on to field off force). Also, specializations to existing models such as the Herschel-Bulkley, the Biviscous, and the Bingham-plastic models, are shown to be easily captured by this model when physical constraints (idealizations) are placed on the rheological behavior of the MR fluid.
APA, Harvard, Vancouver, ISO, and other styles
7

LEE, DUG-YOUNG, YOUNG-TAI CHOI, and NORMAN M. WERELEY. "PERFORMANCE ANALYSIS OF SMART IMPACT DAMPER SYSTEM USING HERSCHEL-BULKLEY MODEL." In Proceedings of the Eighth International Conference. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777546_0038.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Liao, Linqing, Changrong Liao, Jianguo Cao, and L. J. Fu. "A design methodology of magentorheological fluid damper using Herschel-Bulkley model." In Fifth International Symposium on Instrumentation and Control Technology, edited by Guangjun Zhang, Huijie Zhao, and Zhongyu Wang. SPIE, 2003. http://dx.doi.org/10.1117/12.522125.

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

Saasen, Arild, and Jan David Ytrehus. "Viscosity Models for Drilling Fluids: Viscosity Parameters and Their Use." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-96595.

Full text
Abstract:
Abstract The most common viscosity models used in the drilling industry are the Bingham, the Power-Law and the Herschel-Bulkley models. The scope of the present paper is to outline how to select the individual models, and how the models need to be re-formulated to be able to have parameters with a physical meaning. In principle, the Bingham model itself have physical parameters being the yield point and the plastic viscosity. However, the Bingham model very often only very poorly describe the viscosity in complex fluids. This yield stress can be described within a reasonable accuracy by application of the low-shear yield point. A similar problem exists with the Power-Law model resulting from the model’s absence of a yield stress. The compromise model is the Herschel-Bulkley model which contains a yield stress and a power-law term. This model describes the drilling fluid viscosity with reasonable accuracy and includes both the Bingham and Power-Law models as limit formulations. It is not possible to select fluids based on the Herschel-Bulkley traditional parameters alone. The reason is that the Herschel-Bulkley power-law term’s viscosity parameter has a unit dependent on its power-law exponent. In the present approach the fluid is described using a yield stress, a surplus stress at a characteristic shear rate of the fluid flow and finally a power-law exponent making the fluid applicable in the practical shear rate ranges. The surplus stress is no-longer dependent on other parameters. Hence, we have re-arranged the viscosity model to have independent measurable quantities.
APA, Harvard, Vancouver, ISO, and other styles
10

Ouyang, L., D. Zhu, and A. D. Hill. "Theoretical and Numerical Simulation of Herschel-Bulkley Fluid Flow in Propped Fractures." In International Petroleum Technology Conference. International Petroleum Technology Conference, 2013. http://dx.doi.org/10.2523/iptc-17011-ms.

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

Reports on the topic "Bulkley"

1

Burroughs, Jedadiah, Jason Weiss, and John Haddock. Influence of high volumes of silica fume on the rheological behavior of oil well cement pastes. Engineer Research and Development Center (U.S.), July 2021. http://dx.doi.org/10.21079/11681/41288.

Full text
Abstract:
Specialized classes of concrete, such as ultra-high-performance concrete, use volumes of silica fume in concrete that are higher than those in conventional concrete, resulting in increased water demand and mixing difficulty. This study considered the effects of eight different silica fumes in three dosages (10%, 20%, 30%) with three w/b (0.20, 0.30, 0.45) on rheological behavior as characterized by the Herschel-Bulkley model. Results indicated that the specific source of silica fume used, in addition to dosage and w/b, had a significant effect on the rheological behavior. As such, all silica fumes cannot be treated as equivalent or be directly substituted one for another without modification of the mixture proportion. The rheology of cement pastes is significantly affected by the physical properties of silica fume more so than any chemical effects.
APA, Harvard, Vancouver, ISO, and other styles
2

Geacintov, N. E. Base sequence effects on DNA replication influenced by bulky adducts. Final report, March 1, 1995--February 28, 1997. Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/510364.

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

Wallace, Kevin C., Andy H. Liu, John C. Dewan, and Richard R. Schrock. Preparation and Reactions of Tantalum Alkylidene Complexes Containing Bulky Phenoxide or Thiolate Ligands. Controlling Ring-Opening Metathesis Polymerization Activity and Mechanism Through Choice of Anionic Ligand. Fort Belvoir, VA: Defense Technical Information Center, July 1988. http://dx.doi.org/10.21236/ada198293.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Bulkley' for particular source types:
Journal articles Dissertations / Theses Books
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