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Colloidal Dynamics Simulations Of Rheology And Stability Of Concentrated Fuel Slurries
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Book Synopsis Colloidal Dynamics Simulations of Rheology and Stability of Concentrated Fuel Slurries by : Gerald Wilemski
Download or read book Colloidal Dynamics Simulations of Rheology and Stability of Concentrated Fuel Slurries written by Gerald Wilemski and published by . This book was released on 1987 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a Phase I SBIR project to calculate properties of concentrated colloidal suspensions using computer simulation methods. Equilibrium and nonequilibrium Brownian dynamics (NEBD) simulations were performed for concentrated aqueous and nonaqueous colloidal suspensions. These are the first calculations of suspension shear viscosity based on NEBD simulations. Stability estimates were also made for sterically stabilized nonaqueous suspensions. The NEBD calculations provide quantitative evidence for the disturbance of the equilibrium structure of the dispersions by shearing. Shear viscosities have been calculated as a function of shear rate and particle volume fraction. Good agreement was obtained with experimental viscosities for comparable systems. The simulation results are sensitive to the type, strength and range of the potential interactions used to describe the dispersion. These results demonstrate that the NEBD technique is capable of describing the essential features of sheared suspension behavior. They also establish the feasibility and desirability of using NEBD simulation methods as a predictive engineering tool for the design of slurries. Keywords: Colloidal dynamics, Rheology, Fuel slurries, Computer simulation.
Book Synopsis Technical Reports Awareness Circular : TRAC. by :
Download or read book Technical Reports Awareness Circular : TRAC. written by and published by . This book was released on 1987 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Coal Abstracts written by and published by . This book was released on 1989 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theory and Applications of Colloidal Suspension Rheology by : Norman J. Wagner
Download or read book Theory and Applications of Colloidal Suspension Rheology written by Norman J. Wagner and published by Cambridge University Press. This book was released on 2021-04-15 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential text on practical application, theory and simulation, written by an international coalition of experts in the field and edited by the authors of Colloidal Suspension Rheology. This up-to-date work builds upon the prior work as a valuable guide to formulation and processing, as well as fundamental rheology of colloidal suspensions. Thematically, theory and simulation are connected to industrial application by consideration of colloidal interactions, particle properties, and suspension microstructure. Important classes of model suspensions including gels, glasses and soft particles are covered so as to develop a deeper understanding of industrial systems ranging from carbon black slurries, paints and coatings, asphalt, cement, and mine tailings, to natural suspensions such as biocolloids, protein solutions, and blood. Systematically presenting the established facts in this multidisciplinary field, this book is the perfect aid for academic researchers, graduate students, and industrial practitioners alike.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1987 with total page 1258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1987 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamics and Rheology of Particulate Suspensions Undergoing Steady and Unsteady Shear Flows by : Hyun-Ok Park
Download or read book Dynamics and Rheology of Particulate Suspensions Undergoing Steady and Unsteady Shear Flows written by Hyun-Ok Park and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Secondly, the stability and rheology of the single walled carbon nanotube (SWNT) suspensions prepared by interfacial trapping method is examined and compared to a conventional method of ultracentrifugation. Since the rheological properties are sensitive to the suspension microstructure, the change of rheological properties, such as viscosity, can be employed as a systematic standard of stability. The steady shear viscosities have been measured and compared as a function of shear rate and aging time of the suspension. Also, the visual states of the suspension have been observed. The rheology of the SWNT suspensions depends on the preparation of surfactant solution. Also, the interfacial trapping method generated similar behaviors to the SWNT suspension prepared by the ultracentrifugation method. Finally, the dynamics of non-colloidal spheres in oscillatory shear flow is studied by experiment and simulation. Two distinct scales are observed for the development of the rheology in time. At small total strains, a rapid decay of ... is observed, while ... and ... remain constant. However, the evolution of the complex viscosity is observed over large total strains, indicating microstructural changes over long times. Also, this suspension system shows a non-monotonic dependence of viscosity on strain amplitude. Stokesian dynamics simulations are used to correlate the rheology and microstructures.
Book Synopsis Mudflow Rheology and Dynamics by : Philippe Coussot
Download or read book Mudflow Rheology and Dynamics written by Philippe Coussot and published by Routledge. This book was released on 2017-11-01 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting current knowledge in the field of mudflows, this book includes both rheological mudflow aspects, and information on mudflow characteristics in open channels. It includes sections on: · physical properties of suspensions · shear rheometry with suspensions · rheology of clay-water mixtures · rheology of mud suspensions · gradually and rapidly varied free surface flows Part of the IAHR Monograph Series, this informative book also includes fundamental equations for viscoplastic flows and provides the reader with helpful introductions to all the aspects it covers.
Book Synopsis Dynamic Simulation of Concentrated Colloidal Suspensions by : Kevin Richard Hase
Download or read book Dynamic Simulation of Concentrated Colloidal Suspensions written by Kevin Richard Hase and published by . This book was released on 2001 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis SRC-water Slurry Rheology. Final Technical Report by :
Download or read book SRC-water Slurry Rheology. Final Technical Report written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: SRC-water slurries exhibit properties that qualify them for use as fuel in conventional oil-fired combustion facilities. However, to date, the slurries tested have shown storage instability, which requires constant agitation and recirculation to avoid sedimentation in the storage tanks. High viscosities of the material being evaluated hampered the test performance. A program was instituted to better understand the variables responsible for viscosity and static stability of these slurries. Effective additives and concentrations were determined. This report presents laboratory data demonstrating that solid concentration, particle size distribution, additive concentration, and slurry preparation technique influence the viscosity and stability characteristics of an SRC-water slurry. 7 references, 12 figures, 11 tables.
Book Synopsis Current Awareness in Particle Technology by :
Download or read book Current Awareness in Particle Technology written by and published by . This book was released on 1996 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rheology of Colloidal Suspensions by : Safa Jamali
Download or read book Rheology of Colloidal Suspensions written by Safa Jamali and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computational studies have emerged as a key class of scientific approached to solving different problems of interest in the past few decades. Dissipative Particle Dynamics, DPD, a mesoscale simulation technique based on Molecular Dynamics has been established as a powerful technique in recovering a wide range of physical and chemical processes. Nevertheless, absence of robust bridge between the computational parameters to the physical characteristics of a system has limited applications of DPD. Thus in the second chapter of this dissertation (after a brief introduction and organizational guideline in chapter 1) a systematic study will be presented, providing several routes for setting the simulation parameters based on the real experimental measures. Although computational and theoretical works have always been a crucial areas of research in the rheology society, DPD has not been employed in rheological studies. This is mainly due to the fact that a step-by-step guideline does not exist for rheological measurements in DPD. Another reason for this lack of success in rheological community is that the built-in thermostat in DPD is not capable of providing a stable control over the thermodynamics of the system under flow conditions. Thus, firstly in chapter 3 different methods of viscosity measurement and rheological studies will be discussed in detail, and consequently in chapter 4 a novel thermostat is presented to modify the natural shortcomings of DPD under flow. For decades now, scientists across different disciplines have attempted at identifying the nature of versatile rheological response of colloidal suspensions. Exhibiting Newtonian behavior at very low, shear-thinning at intermediate, and shear-thickening at high flow rates in dense colloidal suspensions exemplifies a broad range of rheological regimes within a simple solid-liquid system. Despite numerous experimental and computational efforts in explaining the underlying mechanism of these behavior, there is still an ongoing debate in the scientific community on the subject. Hence, in final chapter a comprehensive study on rheology of colloidal suspensions (including a complete flow curve, normal stress measurements and microstructural evolutions) is presented, based on the results and foundations in prior chapters as well as in the literature.
Book Synopsis Diffusion and Rheology in Non-Brownian Concentrated Suspensions with Accelerated Stokesian Dynamics Simulations by : Asimina Sierou
Download or read book Diffusion and Rheology in Non-Brownian Concentrated Suspensions with Accelerated Stokesian Dynamics Simulations written by Asimina Sierou and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rheology and Microstructure of Concentrated Suspensions of Plate Shaped Colloidal Particles by : Suzanne Michelle Jogun
Download or read book Rheology and Microstructure of Concentrated Suspensions of Plate Shaped Colloidal Particles written by Suzanne Michelle Jogun and published by . This book was released on 1998 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Rheology written by and published by . This book was released on 1993 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Colloidal Suspension Rheology by : Jan Mewis
Download or read book Colloidal Suspension Rheology written by Jan Mewis and published by Cambridge University Press. This book was released on 2012 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented in an accessible and introductory manner, this is the first book devoted to the comprehensive study of colloidal suspensions.
