Phénomènes de transport avec changement de phase dans les milieux poreux ou colloïdaux PDF Download

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Category : Heat
Languages : fr
Pages : 346

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Author: Michel Frémond
Publisher: Springer Science & Business Media
ISBN: 3642246095
Category : Mathematics
Languages : en
Pages : 313

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Predictive theories of phenomena involving phase change with applications in engineering are investigated in this volume, e.g. solid-liquid phase change, volume and surface damage, and phase change involving temperature discontinuities. Many other phase change phenomena such as solid-solid phase change in shape memory alloys and vapor-liquid phase change are also explored. Modeling is based on continuum thermo-mechanics. This involves a renewed principle of virtual power introducing the power of the microscopic motions responsible for phase change. This improvement yields a new equation of motion related to microscopic motions, beyond the classical equation of motion for macroscopic motions. The new theory sensibly improves the phase change modeling. For example, when warm rain falls on frozen soil, the dangerous black ice phenomenon can be comprehensively predicted. In addition, novel equations predict the evolution of clouds, which are themselves a mixture of air, liquid water and vapor.

Author: J.F. Thimus
Publisher: CRC Press
ISBN: 1000150917
Category : Technology & Engineering
Languages : en
Pages : 676

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This text features 105 papers dealing with the fundamentals and the applications of poromechanics from the Biot conference of 1998, held in Louvain-la-Neuve. Topics include: wave propogation; numerical modelling; identification of poromechanical parameters; and constitutive modelling.

Author: Hafiz Muhammad Ali
Publisher: Elsevier
ISBN: 0443215758
Category : Science
Languages : en
Pages : 392

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Advanced Materials-based Thermally Enhanced Phase Change Materials: Fundamentals and Applications focuses on the use of advanced materials to enhance the thermal characteristics of phase change materials used to maximize heat transfer rate and thermal storage capability of PCMs. This book covers the various aspects of PCMs through characteristics and preparation to heat transfer enhancement with emphasis on prominent applications. This book will progress from cover brief history, literature review, definitions, recent advances, preparation techniques, thermophysical properties and heat transfer characteristics with mathematical models, performance-affecting factors, and applications and challenges of PCMs in manufacturing. A powerful tool for researchers and energy engineers, Advanced Materials-based Thermally Enhanced Phase Change Materials: Fundamentals and Applications offers cutting-edge materials advances, analysis and applications of phase change materials in manufacturing. - Provides an in-depth explanation of phase change materials (PCMs), heat transfer, and thermal characteristics and applications - Covers applications and challenges for commercialization - Explores advanced materials such as nanoparticles, graphene, carbon nanotubes, MXene, metallic foams, and micro fins

Author: Danièle Clausse
Publisher: Bentham Science Publishers
ISBN: 168108130X
Category : Science
Languages : en
Pages : 300

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Emulsions (simple, mixed or multiple) are essentially pure substances, aqueous or organic binary solutions. The have a wide range of uses, including industrial cooling and heat transfer processes. This monograph gives a brief overview of supercooling, crystallization and melting processes within emulsions. Differential scanning calorimetrey (DSC) coupled with RX is the main technique used to demonstrate these processes. Temperature readings in this work have been defined taking into account known nucleation laws. These results have been used to show mass transfers occurring within mixed emulsions (solid ripening) or multiple emulsions (composition ripening), gas hydrate formation due to a chemical reaction between water and a diffuse specific compound, these phenomena being described by diffusive models. Other aspects of heat transfer process covered in this book include the latent energy released at crystallizations or absorbed at the melting (which alters the temperature field through emulsions), the kinetics of phase transformations and self-regulation of temperature in nodules containing phase changing materials. This monograph is intended for advanced chemistry graduates as well as industrial and chemical engineers working with cooling and heat transfer systems.

Author: Michel Fremond
Publisher: Springer Science & Business Media
ISBN: 3540323996
Category : Technology & Engineering
Languages : en
Pages : 405

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In this edited book various novel approaches to problems of modern civil engineering are demonstrated. Experts associated within the Lagrange Laboratory present recent research results in civil engineering dealing both with modelling and computational aspects. Many modern topics are covered, such as monumental dams, soil mechanics and geotechnics, granular media, contact and friction problems, damage and fracture, new structural materials, and vibration damping – presenting the state of the art of mechanical modelling and computational issues in civil engineering.

Author: Sadik Kakaç
Publisher: Springer Science & Business Media
ISBN: 9401132208
Category : Science
Languages : en
Pages : 1083

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The rapid growth of literature on convective heat and mass transfer through porous media has brought both engineering and fundamental knowledge to a new state of completeness and depth. Additionally, several new questions of fundamental merit have arisen in several areas which bear direct relation to further advancement of basic knowledge and applications in this field. For example, the growth of fundamental heat transfer data and correlations for engineering use for saturated media has now reached the point where the relations for heat transfer coefficients and flow parameters are known well enough for design purposes. Multiple flow field regimes in natural convection have been identified in several important enclosure geometries. New questions have arisen on the nature of equations being used in theoretical studies, i. e. , the Validity of Darcy assumption is being brought into question; Wall effects in high and low velocity flow fields have been found to play a role in predicting transport coefficients; The formulation of transport problems in fractured media are being investigated as both an extension of those in a homogeneous medium and for application in engineering systems in geologic media and problems on saturated media are being addressed to determine their proper formulation and solution. The long standing problem of how to adequately formulate and solve problems of multi-phase heat and mass transfer in heterogeneous media is important in the technologies of chemical reactor engineering and enhanced oil recovery.

Author: Fethi Aloui
Publisher: Elsevier
ISBN: 0443190186
Category : Science
Languages : en
Pages : 862

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Handbook of Thermal Management Systems: e-Mobility and Other Energy Applications is a comprehensive reference on the thermal management of key renewable energy sources and other electronic components. With an emphasis on practical applications, the book addresses thermal management systems of batteries, fuel cells, solar panels, electric motors, as well as a range of other electronic devices that are crucial for the development of sustainable transport systems. Chapters provide a basic understanding of the thermodynamics behind the development of a thermal management system, update on Batteries, Fuel Cells, Solar Panels, and Other Electronics, provide a detailed description of components, and discuss fundamentals. Dedicated chapters then systematically examine the heating, cooling, and phase changes of each system, supported by numerical analyses, simulations and experimental data. These chapters include discussion of the latest technologies and methods and practical guidance on their application in real-world system-level projects, as well as case studies from engineering systems that are currently in operation. Finally, next-generation technologies and methods are discussed and considered. - Presents a comprehensive overview of thermal management systems for modern electronic technologies related to energy production, storage and sustainable transportation - Addresses the main bottlenecks in the technology development for future green and sustainable transportation systems - Focuses on the practical aspects and implementation of thermal management systems through industrial case studies, real-world examples, and solutions to key problems

Author: Jean-François Daïan
Publisher: John Wiley & Sons
ISBN: 1118931297
Category : Technology & Engineering
Languages : en
Pages : 277

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Equilibrium and Transfer in Porous Media 3 A porous medium is composed of a solid matrix and its geometrical complement: the pore space. This pore space can be occupied by one or more fluids. The understanding of transport phenomena in porous media is a challenging intellectual task. This book provides a detailed analysis of the aspects required for the understanding of many experimental techniques in the field of porous media transport phenomena. It is aimed at students or engineers who may not be looking specifically to become theoreticians in porous media, but wish to integrate knowledge of porous media with their previous scientific culture, or who may have encountered them when dealing with a technological problem. While avoiding the details of the more mathematical and abstract developments of the theories of macroscopization, the author gives as accurate and rigorous an idea as possible of the methods used to establish the major laws of macroscopic behavior in porous media. He also illustrates the constitutive laws and equations by demonstrating some of their classical applications. The priority is to put the constitutive laws in concrete circumstances without going into technical detail. This third volume in the three-volume series focuses on the applications of isothermal transport and coupled transfers in porous media.

Author: Abdelkarim Ait-Mokhtar
Publisher: John Wiley & Sons
ISBN: 1119006090
Category : Technology & Engineering
Languages : en
Pages : 369

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This book provide a series of designs, materials, characterization and modeling, that will help create safer and stronger structures in coastal areas. The authors take a look at the different materials (porous, heterogeneous, concrete...), the moisture transfers in construction materials as well as the degradation caused by external attacks and put forth systems to monitor the structures or evaluate the performance reliability as well as degradation scenarios of coastal protection systems.