Adrian Bejan, Ibrahim Dincer, Sylvie Lorente, Antonio Miguel, Heitor Reis

Porous and Complex Flow Structures in Modern Technologies (eBook, PDF)

• Format: PDF

Produktbeschreibung

Porous and Complex Flow Structures in Modern Technologies represents a new approach to the field, considering the fundamentals of porous media in terms of the key roles played by these materials in modern technology. Intended as a text for advanced undergraduates and as a reference for practicing engineers, the book uses the physics of flows in porous materials to tie together a wide variety of important issues from such fields as biomedical engineering, energy conversion, civil engineering, electronics, chemical engineering, and environmental engineering.

For example, flows through porous ground play a central role in energy exploration and recovery (oil, geothermal fluids), energy conversion (effluents from refineries and power plants), and environmental engineering (leachates from waste repositories). Similarly, the demands of miniaturization in electronics and in biomedical applications are driving research into the flow of heat and fluids through small-scale porous media (heat exchangers, filters, gas exchangers). Filters, catalytic converters, the drying of stored grains, and a myriad of other applications involve flows through porous media.

Another new feature is the 'constructal' approach to the generation of flow structures for maximal global performance (e.g. maximal heat transfer density) at decreasing length scales. In this direction, the optimized structures become 'designed porous media'.

By providing a unified theoretical framework that includes not only the traditional homogeneous and isotropic media but also coarse structures in which the assumptions of representative elemental volumes or global thermal equilibrium fail, the book provides practicing engineers the tools they need to analyze complex situations that arise in practice. This volume includes examples, a large number of current references and an extensive glossary of symbols.

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Produktdetails

• Verlag: Springer New York
• Seitenzahl: 396
• Erscheinungstermin: 9. März 2013
• Englisch
• ISBN-13: 9781475742213
• Artikelnr.: 44178906

Autorenporträt

ADRIAN BEJAN is the J. A. Jones Professor of Mechanical Engineering at Duke University in Durham, North Carolina.

Inhaltsangabe

ContentsPreface1 Porous Media Fundamentals1.1 Structure1.1.1 Microporous Media1.1.2 Mesoporous Media1.1.3 Macroporous Media1.2 Mass Conservation1.3 Darcy Flow and More Advanced Models1.4 Energy Conservation1.5 Heat and Mass Transfer1.5.1 Fluid Flow1.5.2 Heat Flow 2 Flows in Porous Media2.1 Use Simple Methods First2.2 Scale Analysis of Forced Convection Boundary Layers2.3 Sphere and Cylinder with Forced Convection2.4 Channels with Porous Media and Forced Convection2.5 Scale Analysis of Natural Convection Boundary Layers2.6 Thermal Stratification and Vertical Partitions2.7 Horizontal Walls with Natural Convection2.8 Sphere and Horizontal Cylinder with Natural Convection2.9 Enclosures Heated from the Side2.10 Enclosures Heated from Below2.11 The Method of Intersecting the Asymptotes2.11.1 The Many Counterflows Regime2.11.2 The Few Plumes Regime2.11.3 The Intersection of Asymptotes 3 Energy Engineering3.1 Thermodynamics Fundamentals: Entropy Generation or Exergy Destruction3.2 Exergy Analysis3.3 Thermal Energy Storage3.4 Sensible Heat Storage3.5 Aquifer Thermal Energy Storage3.6 Latent Heat Storage3.7 Cold Thermal Energy Storage3.8 Porous Medium Model of a Storage System with Phase-Change Material3.9 Fuel Cell Principles and Operation3.10 Fuel Cell Structure and Performance3.11 The Concept of Exergy-Cost-Energy-Mass (EXCEM) Analysis3.12 Exergy, Environment, and Sustainable Development 4 Environmental and Civil Engineering4.1 The Energy-Environment Interface4.2 Wakes: Concentrated Heat Sources in Forced Convection4.3 Plumes: Concentrated Heat Sources in Natural Convection4.4 Penetrative Convection4.5 Aerosol Transport and Collection in Filters4.6 Filter Efficiency and Filtration Theories4.7 Pressure Drop, Permeability,and Filter Performance4.8 Ionic Transport4.9 Reactive Porous Media4.10 Electrodiffusion4.11 Tree-Shaped Flow Networks4.12 Optimal Size of Flow Element4.13 Hot Water Distribution Networks4.14 Minimal Resistance Versus Minimal Flow Length 5 Compact Heat Transfer Flow Structures5.1 Heat Exchangers as Porous Media5.2 Optimal Spacings in Natural Convection5.3 Optimal Spacings in Forced Convection5.4 Pulsating Flow5.5 Optimal Packing of Fibrous Insulation5.6 Optimal Maldistribution: Tree-Shaped Flows5.7 Dendritic Heat Exchangers5.7.1 Elemental Volume5.7.2 First Construct5.7.3 Second Construct5.8 Constructal Multiscale Structure for Maximal Heat Transfer Density5.8.1 Heat Transfer5.8.2 Fluid Friction5.8.3 Heat Transfer Rate Density: The Smallest Scale5.9 Concluding Remarks 6 Living Structures6.1 Respiratory System6.1.1 Airflow Within the Bronchial Tree6.1.2 Alveolar Gas Diffusion6.1.3 Particle Deposition6.2 Blood and the Circulatory System6.3 Biomembranes: Structure and Transport Mechanisms6.3.1 Cell Membrane6.3.2 Capillary Wall6.4 Transport of Neutral Solutes Across Membranes6.5 Transport of Charged Solutes Across Membranes6.5.1 Membrane Potential6.5.2 Electrical Equivalent Circuit6.6 The Kidney and the Regulation of Blood Composition6.6.1 Kidney Failure and Dialysis6.6.2 Pumping Blood Through Semipermeable Membranes 7 Drying of Porous Materials7.1 Introduction7.2 Drying Equipment7.3 Drying Periods7.4 Basic Heat and Moisture Transfer Analysis7.5 Wet Material7.6 Types of Moisture Diffusion7.7 Shrinkage7.8 Modeling of Packed-Bed Drying7.9 Diffusion in Porous Media with Low Moisture Content7.10 Modeling of Heterogeneous Diffusion in Wet Solids7.10.1 Mass Transfer7.10.2 Heat Transfer7.10.3 Boundary Cond