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Porous and Complex Flow Structures in Modern Technologies - Adrian Bejan

Porous and Complex Flow Structures in Modern Technologies

Hardcover Published: 1st April 2004
ISBN: 9780387202259
Number Of Pages: 396

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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. Thus, for example, flows of water and oil through porous ground play a central role in energy exploration and recovery (oil wells, 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.

By providing a unified theoretical framework that includes not only the traditional homogeneous and isotropic media but also models 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, solved problems and an extensive glossary of symbols.

Contents Preface
Porous Media Fundamentals
Structure
Microporous Media
Mesoporous Media
Macroporous Media
Mass Conservation
Darcy Flow and More Advanced Models
Energy Conservation
Heat and Mass Transfer
Fluid Flow
Heat Flow
Flows in Porous Media
Use Simple Methods First
Scale Analysis of Forced Convection Boundary Layers
Sphere and Cylinder with Forced Convection
Channels with Porous Media and Forced Convection
Scale Analysis of Natural Convection Boundary Layers
Thermal Stratification and Vertical Partitions
Horizontal Walls with Natural Convection
Sphere and Horizontal Cylinder with Natural Convection
Enclosures Heated from the Side
Enclosures Heated from Below
The Method of Intersecting the Asymptotes
The Many Counterflows Regime
The Few Plumes Regime
The Intersection of Asymptotes
Energy Engineering
Thermodynamics Fundamentals: Entropy Generation or Exergy Destruction
Exergy Analysis
Thermal Energy Storage
Sensible Heat Storage
Aquifer Thermal Energy Storage
Latent Heat Storage
Cold Thermal Energy Storage
Porous Medium Model of a Storage System with Phase-Change Material
Fuel Cell Principles and Operation
Fuel Cell Structure and Performance
The Concept of Exergy-Cost-Energy-Mass (EXCEM) Analysis
Exergy, Environment, and Sustainable Development
Environmental and Civil Engineering
The Energy-Environment Interface
Wakes: Concentrated Heat Sources in Forced Convection
Plumes: Concentrated Heat Sources in Natural Convection
Penetrative Convection
Aerosol Transport and Collection in Filters
Filter Efficiency and Filtration Theories
Pressure Drop, Permeability, and Filter Performance
Ionic Transport
Reactive Porous Media
Electrodiffusion
Tree-Shaped Flow Networks
Optimal Size of Flow Element
Hot Water Distribution Networks
Minimal Resistance Versus Minimal Flow Length
Compact Heat Transfer Flow Structures
Heat Exchangers as Porous Media
Optimal Spacings in Natural Convection
Optimal Spacings in Forced Convection
Pulsating Flow
Optimal Packing of Fibrous Insulation
Optimal Maldistribution: Tree-Shaped Flows
Dendritic Heat Exchangers
Elemental Volume
First Construct
Second Construct
Constructal Multiscale Structure for Maximal Heat Transfer Density
Heat Transfer
Fluid Friction
Heat Transfer Rate Density: The Smallest Scale
Concluding Remarks
Living Structures
Respiratory System
Airflow Within the Bronchial Tree
Alveolar Gas Diffusion
Particle Deposition
Blood and the Circulatory System
Biomembranes: Structure and Transport Mechanisms
Cell Membrane
Capillary Wall
Transport of Neutral Solutes Across Membranes
Transport of Charged Solutes Across Membranes
Membrane Potential
Electrical Equivalent Circuit
The Kidney and the Regulation of Blood Composition
Kidney Failure and Dialysis
Pumping Blood Through Semipermeable Membranes
Drying of Porous Materials
Introduction
Drying Equipment
Drying Periods
Basic Heat and Moisture Transfer Analysis
Wet Material
Types of Moisture Diffusion
Shrinkage
Modeling of Packed-Bed Drying
Diffusion in Porous Media with Low Moisture Content
Modeling of Heterogeneous Diffusion in Wet Solids
Mass Transfer
Heat Transfer
Boundary Conditions
Numerical Analysis
Heat and Mass Transfer Coefficients
Correlation for the Drying of Solids
Multidisciplinary Applications
Walls with Cavities: Insulation and Strength Combinednbsp
Fibers Coated with Phase-Change Material
Methane Hydrate Sediments: Gas Formation and Convection
Nomenclature
References
Index
Table of Contents provided by Publisher. All Rights Reserved.

ISBN: 9780387202259
ISBN-10: 0387202250
Audience: General
Format: Hardcover
Language: English
Number Of Pages: 396
Published: 1st April 2004
Publisher: Springer-Verlag New York Inc.
Country of Publication: US
Dimensions (cm): 23.62 x 15.49  x 2.29
Weight (kg): 0.66

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