Rheology and Structure of Flocculated Suspensions PDF Download
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Author: Reinaldo Conrado Navarrete
Publisher:
ISBN:
Category : Flocculation
Languages : en
Pages : 0
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Author: Reinaldo Conrado Navarrete
Publisher:
ISBN:
Category : Flocculation
Languages : en
Pages : 0
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Book Description
Author: Reinaldo Conrado Navarrete
Publisher:
ISBN:
Category :
Languages : en
Pages : 326
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Book Description
Author: Jan Mewis
Publisher: Cambridge University Press
ISBN: 0521515998
Category : Science
Languages : en
Pages : 417
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Book Description
Presented in an accessible and introductory manner, this is the first book devoted to the comprehensive study of colloidal suspensions.
Author: Norman J. Wagner
Publisher: Cambridge University Press
ISBN: 1108423035
Category : Science
Languages : en
Pages : 437
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Book Description
Essential text on the practical application and theory of colloidal suspension rheology, written by an international coalition of experts.
Author: Dennis R. Dinger
Publisher: Lulu.com
ISBN: 0557814057
Category : Technology & Engineering
Languages : en
Pages : 199
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Book Description
This book was written to help ceramists to understand the subject of rheology as it applies to suspensions. Topics discussed include viscosity and rheology fundamentals, syneresis and dilatancy and their causes and effects in ceramic process systems, the rheological effects of gelation, flocculation, and deflocculation, as well as the different types of viscometers that can be used to measure rheological properties. Many practical considerations are included throughout this book. The discussion in the final chapter covers the methods available to adjust and control suspension rheologies in the ceramic process environment. This book will be valuable reading and a handy reference for all ceramists, including students, technicians, engineers, managers, and artists, who want to learn more about the rheology of suspensions.
Author: Ulrich Bröckel
Publisher: John Wiley & Sons
ISBN: 3527654763
Category : Technology & Engineering
Languages : en
Pages : 367
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Book Description
Covering the whole value chain - from product requirements and properties via process technologies and equipment to real-world applications - this reference represents a comprehensive overview of the topic. The editors and majority of the authors are members of the European Federation of Chemical Engineering, with backgrounds from academia as well as industry. Therefore, this multifaceted area is highlighted from different angles: essential physico-chemical background, latest measurement and prediction techniques, and numerous applications from cosmetic up to food industry. Recommended reading for process, pharma and chemical engineers, chemists in industry, and those working in the pharmaceutical, food, cosmetics, dyes and pigments industries.
Author: Rajesh Kumar Mallavajula
Publisher:
ISBN:
Category :
Languages : en
Pages : 138
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Book Description
It is well known that the shape of particles is an important factor that determines the fluid flow behavior of suspensions. Interactions of cubic particles with one another and with the flow medium are unique because of their sharp edges, corners and flat surfaces. Using theory, simulations and experiments, the structure and flow properties of cube-shaped particles in suspension over a range of volume fractions is studied to understand the effect of shape on fluid structure and rheology. At very low volume fractions, the sharp edges and corners of cubes are found to profoundly alter the velocity field around the cube. The stresslet-strain relationship for a cube is anisotropic and depends on the orientation of the cube with respect to the velocity flow field. The effective viscosity of the suspension in a simple shear flow is obtained by computing the orientationaly averaged stresslet acting on cubes. These calculations yield a universal intrinsic viscosity, [[eta]] = 3.1 for sharp cubes, which is higher than the corresponding value for spheres [[eta]] = 5/2. Using the 2D velocity flow profile around sharp corners we further find that the pressure becomes singular near the edges of the cube, which results in the increased value of stress and hence the higher viscosity when compared with spherical particles. In the presence of an external torque acting on each cube, the orientation distribution is no longer isotropic. This can be achieved by using magnetic cubes in magnetic field. The general expression for the stress in a suspension of mag- netic cubes subjected to linear velocity field in presence of an external magnetic field is calculated. We find that the intrinsic viscosity for the weakly Brownian suspension in a simple shear flow can be varied between [[eta]] = 3.25 to [[eta]] = 5.5 by changing the strength and the direction of the applied magnetic field. At low to moderate volume fractions, Brownian dynamics simulations were carried out to study the structure and flow behavior of suspensions. Simulations were performed over a wide range of volume fractions and Pe to study its rheological properties. Our equilibrium results show that cubic particles behave like spheres interacting with a soft repulsion potential function for volume fractions less than 0.25. This soft repulsion potential captures the orientationally averaged excluded volume of the cubes and produces identical probability distributions as that of for cubes at very low volume fractions. For higher volume fractions, cubic particles starts to lose their orientational freedom resulting in the deviation of equilibrium properties from that of soft spheres. We also found that suspension of cubic particles when subjected to simple shear will produce higher viscosity when compared with spherical particles in suspensions with equivalent volume. We show that the suspension rheology in this regime can be discussed in terms of ordering and collisions among hard cubic particles. In order to gain insights from experiments, cubic particles of varying sizes (10nm to 5 micron sized cubes) and chemistries (PbT e, Fe3 O4 and MnCO3) were synthesized. Polymer brushes were also attached on the surfaces of PbT e and Fe3 O4 nanocubes to characterize the effect of particle surface chemistry on flow behavior. MnCO3 spherical particles of similar sizes as that of MnCO3 cubes were also synthesized and their suspension behavior studied to empirically characterize the effects of shape. A key result from this study is that irrespective of the cube size, size distribution, and surface chemistry, the intrinsic viscosity([[eta]]) for cube-shaped particles is [[eta]] = 3.1 ± 0.2 which agrees well with the value estimated from theory.
Author: P. Moldenaers
Publisher: Elsevier
ISBN: 1483294161
Category : Technology & Engineering
Languages : en
Pages : 1110
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Book Description
More than 900 authors from over 35 countries contributed to the 1992 International Congress on Rheology. These proceedings volumes comprise 17 plenary and keynote papers, 250 oral contributions and some 200 poster presentations. All relevant aspects of rheology are covered, e.g., theoretical rheology, molecular theories, fluid mechanics, rheometry, experimental methods, foams, polymer solutions, polymer melts, rubber, solids, composites, biorheology, industrial rheology, polymer processing, food rheology and electrorheology, reflecting the development of rheology into a broad, multidisciplinary field of recognized academic and industrial relevance.
Author: Ronald G. Larson
Publisher: OUP USA
ISBN: 9780195121971
Category : Mathematics
Languages : en
Pages : 688
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Book Description
The Structure and Rheology of Complex Fluids describes the microstructures of polymeric, colloidal, amphiphilic, and liquid crystalline liquids, and the relationship between microstructure and mechanical and flow properties. It provides illustrations, practical examples, and worked problems. This book can serve as both a textbook for a graduate course and a research monograph.
Author:
Publisher:
ISBN: 9781628709254
Category : Complex fluids
Languages : en
Pages :
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