Mechanics Heat Transfer Relation For Particulate Materials
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Mechanics Heat Transfer Relation For Particulate Materials
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Author :
language : en
Publisher:
Release Date : 1991
Mechanics Heat Transfer Relation For Particulate Materials written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The original goal of this study was to try and understand the relationship between the thermal and mechanical properties of particulate flows. Two situations were examined. The first is a study of the effects of simple shear flows, as a embryonic flow type on the apparent thermal conductivity and apparent viscosity of a dry granular flow. The second study involved fluidized beds. The original idea was to try and relate the heat transfer behavior of a fluidized bed to the particle pressure, '' the forces by only the particle phase of the two-phase mixture. (VC).
Mechanics Heat Transfer Relation For Particulate Materials Measure Of Particle Pressure Generated In A Bed Of Fcc Catalyst That Is Undergoing Particulate Fluidization
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Author :
language : en
Publisher:
Release Date : 1991
Mechanics Heat Transfer Relation For Particulate Materials Measure Of Particle Pressure Generated In A Bed Of Fcc Catalyst That Is Undergoing Particulate Fluidization written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The major emphasis this quarter has been in two areas. The first is to continue working the bugs out of the new particle pressure transducer. The second was to try and measure the particle pressures generated in a bed of FCC catalyst that is undergoing particulate fluidization. The results indicate that the stabilization of fluidized beds in that regime cannot be explained in terms of particle pressure generation. Instead, consistent with other recent observations, the observations can be explained by a material is that not completely fluidized but, instead, retains much of the properties of a solid and, in particular, can transmit particle pressure like a solid. 2 figs.
Mechanics Heat Transfer Relation For Particulate Materials For July 1991
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Author :
language : en
Publisher:
Release Date : 1991
Mechanics Heat Transfer Relation For Particulate Materials For July 1991 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The major emphasis this quarter has been in two areas. The first is to continue working the bugs out of the new particle pressure transducer. The second was to try and measure the particle pressures generated in a bed catalyst that is undergoing particulate fluidization. The results indicate that the stabilization of fluidized beds in that regime cannot be explained in terms of particle pressure generation. Instead, consistent with other recent observations, the observations can be explained by a material is that not completely fluidized but, instead, retains much of the properties of a solid and, in particular, can transmit particle pressure like a solid. Also, in this quarter, one of the author's students, David Wang, successfully defended his PhD thesis; his research was sponsored by this grant and concerned both the thermal conductivity measurements and the early work on particle pressures in fluidized beds. The particle pressure work was also presented at the ITEM Symposium on the Mechanics of Fluidized Beds, held at Stanford in the early part of this month.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1992
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.
Heat And Mass Transfer In Particulate Suspensions
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Author :
language : en
Publisher: Springer
Release Date : 2013-01-04
Heat And Mass Transfer In Particulate Suspensions written by and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-04 with categories.
Heat And Mass Transfer In Particulate Suspensions
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Author : Efstathios E. Stathis Michaelides
language : en
Publisher: Springer
Release Date : 2013-01-03
Heat And Mass Transfer In Particulate Suspensions written by Efstathios E. Stathis Michaelides and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-01-03 with Technology & Engineering categories.
Heat and Mass Transfer in Particulate Suspensions is a critical review of the subject of heat and mass transfer related to particulate Suspensions, which include both fluid-particles and fluid-droplet Suspensions. Fundamentals, recent advances and industrial applications are examined. The subject of particulate heat and mass transfer is currently driven by two significant applications: energy transformations –primarily combustion – and heat transfer equipment. The first includes particle and droplet combustion processes in engineering Suspensions as diverse as the Fluidized Bed Reactors (FBR’s) and Internal Combustion Engines (ICE’s). On the heat transfer side, cooling with nanofluids, which include nanoparticles, has attracted a great deal of attention in the last decade both from the fundamental and the applied side and has produced several scientific publications. A monograph that combines the fundamentals of heat transfer with particulates as well as the modern applications of the subject would be welcomed by both academia and industry.
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1993
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Power resources categories.
Numerical Modeling And Simulation Of Particulate Fouling On Structured Heat Transfer Surfaces Using Multiphase Eulerian Lagrangian Les
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Author : Robert Kasper
language : en
Publisher: Cuvillier Verlag
Release Date : 2021-04-30
Numerical Modeling And Simulation Of Particulate Fouling On Structured Heat Transfer Surfaces Using Multiphase Eulerian Lagrangian Les written by Robert Kasper and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-30 with Technology & Engineering categories.
Durch die gezielte Strukturierung von wärmeübertragenden Oberflächen, wie beispielsweise durch Dellen oder Rippen, kann die örtliche Turbulenz und damit die thermische Durchmischung gesteigert werden. Dies kann die Effizienz von Wärmeübertragern oder Bauteilkühlsystemen erheblich erhöhen. Derartige Oberflächenstrukturrierungen begünstigen jedoch das Partikelfouling, daher die Ablagerung suspendierter Partikel, wie z.B. Sand, Schlamm oder Korrosionsprodukte. Gegenstand dieser Arbeit ist die Entwicklung eines universellen, numerischen CFD-Verfahrens zur Vorhersage des partikulären Foulings auf strukturierten Oberflächen, speziell Dellenoberflächen. Das entwickelte Verfahren basiert auf einer Kombination des Lagrangian-Particle-Trackings zur Beschreibung der dispersen Phase (Foulingpartikel), sowie räumlich und zeitlich aufgelöster Large-Eddy Simulation für die Berechnung der kontinuierlichen Phasen (Trägerfluid). Dieses Vorgehen ermöglicht nicht nur die Auswertung der infolge der Partikelablagerungen verminderten thermo-hydraulischen Effizienz, sondern auch die Untersuchung der Wechselwirkungen zwischen turbulenten Strömungsstrukturen und dem partikulärem Fouling. Dadurch kann gezeigt werden, dass die Verwendung von sphärischen Dellen als Oberflächenstrukturen nicht nur aus thermo-hydraulischer Sicht die optimale Wahl darstellt, sondern auch eine substantielle Verminderung des Partikelfoulings begünstigt. The application of structured heat transfer surfaces, such as dimples or ribs, increase the local turbulence and thus thermal mixing. This can improve the efficiency of heat exchangers or cooling systems significantly. However, structured surfaces are known to promote particulate fouling, hence the unwanted accumulation and deposition of suspended particles (e.g., silt, sludge or iron oxide). The scope of this work is the development of a universal numerical CFD method for the prediction of particulate fouling, especially on dimpled surfaces. The proposed approach is based on a combination of the Lagrangian point-particle tracking for the description of the disperse phase (fouling particles), and spatially and temporally resolved large-eddy simulations for the calculation of the continuous phase (carrier fluid). This approach allows not only the evaluation of the reduced thermo-hydraulic efficiency due to particle deposition, but also the investigation of the interaction between turbulent flow structures and the particulate fouling. It can be shown that the usage of spherical dimples as surface structures is not only the optimal choice from a thermo-hydraulic point of view, but also favors a substantial reduction of particulate fouling.
Particulate Technology
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Author : Clyde Orr
language : en
Publisher:
Release Date : 1966
Particulate Technology written by Clyde Orr and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Particles categories.
Electromagnetic Mechanical And Transport Properties Of Composite Materials
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Author : Rajinder Pal
language : en
Publisher: CRC Press
Release Date : 2014-08-27
Electromagnetic Mechanical And Transport Properties Of Composite Materials written by Rajinder Pal and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-08-27 with Science categories.
In the design, processing, and applications of composite materials, a thorough understanding of the physical properties is required. It is important to be able to predict the variations of these properties with the kind, shape, and concentration of filler materials. The currently available books on composite materials often emphasize mechanical properties and focus on classification, applications, and manufacturing. This limited coverage neglects areas that are important to new and emerging applications. For the first time in a single source, this volume provides a systematic, comprehensive, and up-to-date exploration of the electromagnetic (electrical, dielectric, and magnetic), mechanical, thermal, and mass-transport properties of composite materials. The author begins with a brief discussion of the relevance of these properties for designing new materials to meet specific practical requirements. The book is then organized into five parts examining: The electromagnetic properties of composite materials subjected to time-invariant electric and magnetic fields The dynamic electromagnetic properties of composite materials subjected to time-varying electric and magnetic fields The mechanical elastic and viscoelastic properties of composites Heat transfer in composites and thermal properties (thermal conductivity, thermal diffusivity, coefficient of thermal expansion, and thermal emissivity) Mass transfer in composite membranes and composite materials Throughout the book, the analogy between various properties is emphasized. Electromagnetic, Mechanical, and Transport Properties of Composite Materials provides both an introduction to the subject for newcomers and sufficient in-depth coverage for those involved in research. Scientists, engineers, and students from a broad range of fields will find this book a comprehensive source of information.