Download or read book The Design and Flow Dynamics of Non Brownian Suspensions written by Ahmadreza Rashedi and published by . This book was released on 2020 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rheology of non-Brownian suspension of solids in both simple and complex fluids has drawn much attention since there are so many industrial and daily life applications in the oil industry (e.g., Hydraulic fracturing), food processing, cosmetic, painting, concrete, muds, pharmaceutical, landslides, and mudslides. Characterizing the flow of particles suspended in Newtonian fluids and yield stress fluids is complicated due to complex phenomenon such as shear-induced migration. This phenomenon causes heterogeneity of particles in the fluid phase and size segregation in polydispersed suspension. Shearinduced migration occurs when the configuration of suspension flow is exposed to shear rate gradients such as channel and large gap Taylor-Couette flow. In the present work, the shear induced migration of particles suspended in Newtonian fluids is studied in a channel flow. The results are compared and discussed with theoretical models. It is shown that the prediction of models for the distribution of solid volume fraction is in good agreement with the results obtained in the present work close to the channel walls; however, there is a discrepancy between model prediction and experimental results for volume fraction at channel centerline. In addition, an engineered model suspension consisting of rigid particles and yield stress fluids is developed. The suspending fluid is an emulsion with adjustable density, rheological behavior, and refractive index. We explain the design procedure in detail. The optically transparent emulsion opens the possibility of exploring Particle Tracking/Image Velocimetry (PIV/PTV) techniques in studying dynamic flows involving particles in complex fluids. As a proof of concept, a set of experiments is performed to provide accurate measurements of solid volume fractions for the dispersion of particles in a Taylor-Couette cell.
Download or read book The Design and Flow Dynamics of Non Brownian Suspension written by Ahmadreza Rashedi and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dense suspensions of noncolloidal particles exhibit novel features. In a non-homogeneous shear flow, it is observed that particles migrate from the high shear rate region to the low shear rate region. This phenomenon is called Shear-Induced Migration (SIM). The Suspension Balance Model (SBM) of Nott and Brady (1994) has been taken as an approach to model SIM. Where the SIM is attributed to the diffusive fluxes that arise naturally from gradients in the particle phase stresses. However, there are still unanswered questions and an ongoing debate on the nature of particle stress in the dense suspensions. Recent experiments show that the SBM not only fails in predicting the steady-state distribution of particle phase in the flow of dense suspensions but also fails in predicting the kinetics of the SIM. In addition, recent theoretical works question the derivation of the SBM and the simple supposition of drag closures in inhomogeneous flows of dense suspensions. We have designed and built an original setup to revisit available drag closures via performing well-resolved experiments. We present our preliminary results of a drag closure taking into account inhomogeneities of the solid phase volume fraction and the shear rate.
Download or read book Non equilibrium Dynamics of Confined Colloidal Suspensions in Shear flow written by Sascha Gerloff and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rheology of Non spherical Particle Suspensions written by Francisco Chinesta and published by Elsevier. This book was released on 2015-10-06 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a review of the current understanding of the behavior of non-spherical particle suspensions providing experimental results, rheological models and numerical modeling. In recent years, new models have been developed for suspension rheology and as a result applications for nanocomposites have increased. The authors tackle issues within experimental, model and numerical simulations of the behavior of particle suspensions. Applications of non-spherical particle suspension rheology are widespread and can be found in organic matrix composites, nanocomposites, biocomposites, fiber-filled fresh concrete flow, blood and biologic fluids. - Understand how to model and predict the final microstructure and properties of particle suspensions - Explores nano, micro, meso and macro scales - Rheology, thermomechanical and electromagnetic physics are discussed
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
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.
Download or read book Non equilibrium Dynamics and Feedback Control of Strongly Confined Colloidal Suspensions in a Planar Shear Flow written by Tarlan Azad Vezirov and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Manufacture of Structural Composites written by Lee Harper and published by Woodhead Publishing. This book was released on 2022-11-30 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: Design and Manufacture of Structural Composites provides an overview of the main manufacturing challenges encountered when processing fibre-reinforced composite materials. Composites are unique in that the material is created at the same time as the structure, forming a very close link between the constituents, the manufacturing process and the resulting mechanical performance. This book takes an in-depth look at material choices and the intermediate steps required to convert different fibre and matrix combinations into finished products. It provides an insight into recent developments for each of the manufacturing processes covered, addressing design, cost, rate and mechanical performance. Topics covered include an introduction to composite materials, material preforming and conversion, moulding, digital design and sustainability, which addresses waste reduction, disassembly and fibre recovery. This book has been developed primarily as a teaching resource with contributions from leading experts in the field. The content has evolved from courses given by the authors to mechanical engineering and materials science students, at both undergraduate and postgraduate levels. It also draws upon experience gained during research projects and from leading industry experts. It therefore provides non-specialists with a valuable introduction to composite manufacturing techniques, helping to determine the most suitable manufacturing routes and to understand the challenges associated with the production of high-performance composite components. - Provides an overview of the most common manufacturing routes for fibre reinforced composites, including the influence of the manufacturing route on mechanical properties, production volume and component cost - Discusses recent advances in composite manufacturing, including the use of automation, process simulation, digital factories, and solutions to improve sustainability - Looks at where the composites sector is heading and discusses some of the challenges faced by end-users looking to scale up production and increase the uptake of fibre-reinforced composites for structural applications
Download or read book Advances in Energy Science and Equipment Engineering II Volume 2 written by Shiquan Zhou and published by CRC Press. This book was released on 2017-09-19 with total page 1379 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 2016 2nd International Conference on Energy Equipment Science and Engineering (ICEESE 2016) was held on November 12-14, 2016 in Guangzhou, China. ICEESE 2016 brought together innovative academics and industrial experts in the field of energy equipment science and engineering to a common forum. The primary goal of the conference is to promote research and developmental activities in energy equipment science and engineering and another goal is to promote scientific information interchange between researchers, developers, engineers, students, and practitioners working all around the world. The conference will be held every year to make it an ideal platform for people to share views and experiences in energy equipment science and engineering and related areas. This second volume of the two-volume set of proceedings covers the field of Structural and Materials Sciences, and Computer Simulation & Computer and Electrical Engineering.
Download or read book Food Emulsions written by David Julian McClements and published by CRC Press. This book was released on 2015-08-21 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing the mission of the first two editions, Food Emulsions: Principles, Practices, and Techniques, Third Edition covers the fundamentals of emulsion science and demonstrates how this knowledge can be applied to control the appearance, stability, and texture of emulsion-based foods. Initially developed to fill the need for a single resource co
Download or read book Smart Systems with Shear Thickening Fluid written by Selim Gürgen and published by Springer Nature. This book was released on with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maro Polymer Notes written by and published by . This book was released on 2000 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1978 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Chemical Processing and Design written by John J. McKetta Jr and published by CRC Press. This book was released on 1996-06-19 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supercritical Fluid Technology: Theory and Application to Technology Forecasting
Download or read book Fluid Dynamics of Active Suspensions written by Barath Ezhilan and published by . This book was released on 2016 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is devoted to understanding the effect of inter-particle interactions, external fields and confinement in active suspensions. Active suspensions, such as a bath of swimming micro-organisms, have microstructural elements which are motile and exert active stresses on the suspending fluid. The internally generated stresses in active suspensions lead to an intrinsic coupling between the swimmer configurations and the immersing fluid. The first theme of the thesis focuses on hydrodynamically driven self-organization in active suspensions. We first study the dynamics of concentrated active suspensions in a 3D periodic domain using a coupled Smoluchowski-Stokes kinetic model and discover novel instabilities for both rear-actuated (pusher) and front-actuated (puller) swimmers, characterized by giant number density fluctuations, due to the coupled effects of hydrodynamic and steric interactions. Next, we incorporate chemotactic run-and-tumble effects in the kinetic model to study the dynamics in thin films of aerotactic bacteria. A transition to chaotic dynamics beyond a critical film thickness is reported, in agreement with experiments, and shown to be a consequence of the coupling between aerotactic response of bacteria and hydrodynamic disturbance flows. The second theme focuses on the sole interplay between motility and confinement in dilute suspensions, ignoring the effect of inter-particle interactions. First, we investigate the dynamics of a confined suspension of Brownian swimmers using a simple kinetic model by prescribing a no-flux condition on the probability distribution function of particle configurations and explain several peculiar dynamics reported in experiments, viz., wall accumulation, as well as upstream swimming, centerline depletion and shear-trapping when a pressure-driven flow is imposed. Next, we calculate the swim pressure of non-Brownian run-and-tumble spherical swimmers using a kinetic model based on coupled bulk/surface probability density functions. The third theme focuses on the effect of confinement on active self-organization. We discover a symmetry-breaking phase-transition to a spontaneous flowing state with net fluid pumping beyond a critical concentration in a strongly confined channel. The framework for studying confined active suspensions is also extended to explore geometric control of active self-organization in circular and other complex domains.
Download or read book Information Circular written by and published by . This book was released on 1966 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
