Critique Of Constructal Theory

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Critique of Constructal Theory

XueTao Cheng
Critique of Constructal Theory Book PDF

Author : XueTao Cheng
Publisher : Cambridge Scholars Publishing
Page : 139 pages
File Size : 40,7 Mb
Release : 2019-09-12
Category : Science
ISBN : 9781527539761

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Critique of Constructal Theory by XueTao Cheng Pdf

Constructal theory has been extensively used to analyze and optimize many different shapes and structures in both living and non-living systems. It is generally considered to be a law that could govern the evolutions of shapes and structures in biology, physics, technology, and social organization. Accordingly, it seems that the constructal method is suitable for designing and analyzing all kinds of shapes and structures in the world. However, in most cases, the details for its applications were not carefully checked, meaning that it was often incorrectly applied, and that many unreasonable or inaccurate results were provided. This book systematically reviews and checks the applications of constructal theory in street design, economics, heat transfer optimization, flow systems, and explanations of natural structures and social phenomena. Every detail of the models, methods, optimizations, applications, results and conclusions is analysed, with careful consideration of theoretical derivations and typical examples. Accordingly, the problems and mistakes in the applications of the theory are directly pointed out and discussed in detail. The abuse and limitation of the constructal approach are also discussed. In many cases, it is shown that the theory has significant flaws and is even not applicable in certain circumstances. As constructal theory is widely used in the analysis and design of shapes and structures, this book will be essential for scientists, researchers, engineers, teachers, postgraduates and undergraduates in the fields of structure analysis, design and optimization in physics, biology, flow dynamics, heat transfer and thermodynamics.

Design with Constructal Theory

Adrian Bejan,Sylvie Lorente
Design with Constructal Theory Book PDF

Author : Adrian Bejan,Sylvie Lorente
Publisher : John Wiley & Sons
Page : 572 pages
File Size : 40,9 Mb
Release : 2008-09-09
Category : Technology & Engineering
ISBN : 9780471998167

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Design with Constructal Theory by Adrian Bejan,Sylvie Lorente Pdf

Design course on the universal principle of configurations in nature and engineering-the constructal law Design with Constructal Theory offers a revolutionary new approach based on physics for understanding and predicting the designs that arise in nature and engineering, from the tree and the forest to the cooling of electronics, urban design, decontamination, and vascular smart materials. This book shows how you can use the method of constructal theory to design human-made systems in order to reduce trial and error and increase the system performance. First developed in the late 1990s, constructal theory holds that flow architecture arises from the natural evolutionary tendency to generate greater flow access in time and in flow configurations that are free to morph. It unites flow systems with solid mechanical structures, which are viewed as systems for the flow of stresses. Constructal theory unites nature with engineering, and helps us generate novel designs across the board, from high-density packages to vascular materials with new functionalities (self-healing, self-cooling), and from tree-shaped heat exchangers to svelte fluid-flow and solid structures. Design with Constructal Theory starts with basic principles and then shows how these principles are applied to understanding and designing increasingly complex systems. Problems and exercises at the end of each chapter give you an opportunity to use constructal theory to solve actual design problems. This book is based on a design course developed by the two authors for upper-level undergraduates and graduate students at Duke University and other universities all over the world. With the authors' expert guidance, students and professionals in mechanical, civil, environmental, chemical, aerospace, and biomedical engineering will understand natural systems, and then practice design as science, by relying on constructal strategies to pursue and discover novel and effective designs.

Constructal Theory of Social Dynamics

Adrian Bejan,Gilbert W. Merkx
Constructal Theory of Social Dynamics Book PDF

Author : Adrian Bejan,Gilbert W. Merkx
Publisher : Springer Science & Business Media
Page : 350 pages
File Size : 52,5 Mb
Release : 2007-10-26
Category : Science
ISBN : 9780387476810

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Constructal Theory of Social Dynamics by Adrian Bejan,Gilbert W. Merkx Pdf

Constructal Theory of Social Dynamics brings together for the first time social scientists and engineers who present predictive theory of social organization, as a conglomerate of mating flows that morph in time to flow more easily. The book offers a new way to look at social phenomena as part of natural phenomena, and examines a new domain of application of engineering such as thermodynamic optimization, thermoeconomics and "design as science".

Constructal Law and the Unifying Principle of Design

Luiz A.O. Rocha,Sylvie Lorente,Adrian Bejan
Constructal Law and the Unifying Principle of Design Book PDF

Author : Luiz A.O. Rocha,Sylvie Lorente,Adrian Bejan
Publisher : Springer
Page : 333 pages
File Size : 48,7 Mb
Release : 2012-12-04
Category : Technology & Engineering
ISBN : 9781461450498

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Constructal Law and the Unifying Principle of Design by Luiz A.O. Rocha,Sylvie Lorente,Adrian Bejan Pdf

Design happens everywhere, whether in animate objects (e.g., dendritic lung structures, bacterial colonies, and corals), inanimate patterns (river basins, beach slope, and dendritic crystals), social dynamics (pedestrian traffic flows), or engineered systems (heat dissipation in electronic circuitry). This “design in nature” often takes on remarkably similar patterns, which can be explained under one unifying Constructal Law. This book explores the unifying power of the Constructal Law and its applications in all domains of design generation and evolution, ranging from biology and geophysics to globalization, energy, sustainability, and security. The Constructal Law accounts for the universal tendency of flow systems to morph into evolving configurations that provide greater and easier access over time. The Constructal Law resolves the many and contradictory ad hoc statements of “optimality”, end design, and destiny in nature, such as minimum and maximum entropy production and minimum and maximum flow resistance, and also explains the designs that are observed and copied in biomimetics. Constructal Law and the Unifying Principle of Design covers the fundamentals of Constructal Theory and Design, as well as presenting a variety of state-of-the-art applications. Experts from the biological, physical and social sciences demonstrate the unification of all design phenomena in nature, and apply this knowledge to novel designs in modern engineering, such as vascularization for self-healing and self-cooling materials for aircraft, and tree fins and cavities for heat transfer enhancement.

Entransy

XueTao Cheng
Entransy Book PDF

Author : XueTao Cheng
Publisher : Cambridge Scholars Publishing
Page : 159 pages
File Size : 44,9 Mb
Release : 2023-05-25
Category : Science
ISBN : 9781527512740

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Entransy by XueTao Cheng Pdf

In this book, the author introduces an alternative perspective to understand thermal phenomena, the concept of entransy and its relevant principles, applications and extensions, which have been widely used in the analyses and optimizations of many transport processes. The scientific significance and application value of the theory have been clearly demonstrated. The theory is inevitably questioned, and there are even accusations that are not academically valid. These controversies are also introduced and discussed comprehensively. This book is an introduction to the entransy theory; the author has only selected a few cases that are sufficient to show the advantages and necessity of the application of the theory. This book is helpful to the undergraduates, graduates, teachers, engineers, scientists and researchers in thermal science and engineering.

Design in Nature

Adrian Bejan,J. Peder Zane
Design in Nature Book PDF

Author : Adrian Bejan,J. Peder Zane
Publisher : Anchor
Page : 306 pages
File Size : 43,7 Mb
Release : 2013-01-08
Category : Science
ISBN : 9780307744340

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Design in Nature by Adrian Bejan,J. Peder Zane Pdf

In this groundbreaking book, Adrian Bejan takes the recurring patterns in nature—trees, tributaries, air passages, neural networks, and lightning bolts—and reveals how a single principle of physics, the constructal law, accounts for the evolution of these and many other designs in our world. Everything—from biological life to inanimate systems—generates shape and structure and evolves in a sequence of ever-improving designs in order to facilitate flow. River basins, cardiovascular systems, and bolts of lightning are very efficient flow systems to move a current—of water, blood, or electricity. Likewise, the more complex architecture of animals evolve to cover greater distance per unit of useful energy, or increase their flow across the land. Such designs also appear in human organizations, like the hierarchical “flowcharts” or reporting structures in corporations and political bodies. All are governed by the same principle, known as the constructal law, and configure and reconfigure themselves over time to flow more efficiently. Written in an easy style that achieves clarity without sacrificing complexity, Design in Nature is a paradigm-shifting book that will fundamentally transform our understanding of the world around us.

Fin Shape Thermal Optimization Using Bejan's Constructal Theory

Giulio Lorenzini,Simone Moretti,Alessandra Conti
Fin Shape Thermal Optimization Using Bejan s Constructal Theory Book PDF

Author : Giulio Lorenzini,Simone Moretti,Alessandra Conti
Publisher : Morgan & Claypool Publishers
Page : 222 pages
File Size : 49,6 Mb
Release : 2011-04-29
Category : Mathematics
ISBN : 9781608456079

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Fin Shape Thermal Optimization Using Bejan's Constructal Theory by Giulio Lorenzini,Simone Moretti,Alessandra Conti Pdf

The book contains research results obtained by applying Bejan's Constructal Theory to the study and therefore the optimization of fins, focusing on T-shaped and Y-shaped ones. Heat transfer from finned surfaces is an example of combined heat transfer natural or forced convection on the external parts of the fin, and conducting along the fin. Fin's heat exchange is rather complex, because of variation of both temperature along the fin and convective heat transfer coefficient. Furthermore possible presence of more fins invested by the same fluid flow has to be considered. Classical fin theory tried to reduce the coupled heat transfer problem to a one-dimensional problem by defining an average temperature of the fin and writing equations using this parameter. However, it was shown that this approach cannot be used because of the effects of two-dimensional heat transfer, especially in the presence of short fins. CFD codes offer the possibility to consider bi-dimensional (and more generally, three-dimensional) effects and then a more real approach to the physic phenomena of finned surface's heat exchange. A commercial CFD code was used to analyse the case of heat exchange in presence of T-shaped fins, following an approach suggested by Bejan's Constructal Theory. The comparative results showed a significant agreement with previous research taken as a reference, and this result allows for the application of this approach to a wider range of systems. T-shaped optimized fin geometry is the starting point for further research. Starting from the optimal results (T-shape optimized fins), we show the trend of the assessment parameter (the dimensionless conductance) in function of the angle α between the two horizontal arms of the fin. A value for α, 90°

Function-Based Spatiality and the Development of Korean Communities in Japan

David Rands
Function Based Spatiality and the Development of Korean Communities in Japan Book PDF

Author : David Rands
Publisher : Lexington Books
Page : 203 pages
File Size : 45,8 Mb
Release : 2014-05-21
Category : Social Science
ISBN : 9780739173695

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Function-Based Spatiality and the Development of Korean Communities in Japan by David Rands Pdf

Function-Based Spatiality and the Development of Korean Communities in Japan utilizes the theoretical model of complex adaptive systems and introduces the concept of function-based spatiality to investigate the roles of the urban environments of Tokyo and Osaka in the development of Korean communities in Japan. Analysis of distinct Korean communities allows for the examination of urban factors of each city which contributed to the patterns of Korean immigration and community formation. By utilizing a comparative narrative of the two cities, distinctions between the organic growth of Osaka and the planned city of Tokyo are illuminated. Additionally, the discussion utilizes the concept of function-based spatiality to show how each city interacted with its surrounding regional, national, and global spheres. The functions of Tokyo, as a gateway to Western modernization and center of the Japanese state, shaped the interactions with Korean immigrants. Likewise, Osaka’s functions as a center of mercantilism and second city played a large role in how Koreans were incorporated into the urban ethnoscapes. Taken together, these two examples provide insight to the dynamics of urban systems on the development of immigrant communities.

Non-equilibrium Thermodynamics

Andrea Di Vita
Non equilibrium Thermodynamics Book PDF

Author : Andrea Di Vita
Publisher : Springer Nature
Page : 239 pages
File Size : 40,6 Mb
Release : 2022-09-13
Category : Science
ISBN : 9783031122217

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Non-equilibrium Thermodynamics by Andrea Di Vita Pdf

The importance of thermodynamics, particularly its Second Principle, to all branches of science in which systems with very large numbers of particles are involved cannot be overstated. This book offers a panoramic view of non-equilibrium thermodynamics. Perhaps the two most attractive aspects of thermodynamic equilibrium are its stability and its independence from the specifics of the particular system involved. Does an equivalent exist for non-equilibrium thermodynamics? Many researchers have tried to describe such stability in the same way that the Second Principle describes the stability of thermodynamic equilibrium - and failed. Most of them invoked either entropy, or its production rate, or some modified version of it. In their efforts, however, those researchers have found a lot of useful stability criteria for far-from-equilibrium states. These criteria usually take the form of variational principles, in terms of the minimization or maximization of some quantity. The aim of this book is to discuss these variational principles by highlighting the role of macroscopic quantities. This book is aimed at a wider audience than those most often exposed to the criteria described, i.e., undergraduates in STEM, as well as the usual interested and invested professionals.

The Physics of Life

Adrian Bejan
The Physics of Life Book PDF

Author : Adrian Bejan
Publisher : St. Martin's Press
Page : 336 pages
File Size : 53,8 Mb
Release : 2016-05-24
Category : Science
ISBN : 9781466891340

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The Physics of Life by Adrian Bejan Pdf

The Physics of Life explores the roots of the big question by examining the deepest urges and properties of living things, both animate and inanimate: how to live longer, with food, warmth, power, movement and free access to other people and surroundings. Bejan explores controversial and relevant issues such as sustainability, water and food supply, fuel, and economy, to critique the state in which the world understands positions of power and freedom. Breaking down concepts such as desire and power, sports health and culture, the state of economy, water and energy, politics and distribution, Bejan uses the language of physics to explain how each system works in order to clarify the meaning of evolution in its broadest scientific sense, moving the reader towards a better understanding of the world's systems and the natural evolution of cultural and political development. The Physics of Life argues that the evolution phenomenon is much broader and older than the evolutionary designs that constitute the biosphere, empowering readers with a new view of the globe and the future, revealing that the urge to have better ideas has the same physical effect as the urge to have better laws and better government. This is evolution explained loudly but also elegantly, forging a path that flows sustainability.

Shape and Structure, from Engineering to Nature

Adrian Bejan
Shape and Structure from Engineering to Nature Book PDF

Author : Adrian Bejan
Publisher : Cambridge University Press
Page : 370 pages
File Size : 53,7 Mb
Release : 2000-10-16
Category : Science
ISBN : 0521793882

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Shape and Structure, from Engineering to Nature by Adrian Bejan Pdf

Seemingly universal geometric forms unite the flow systems of engineering and nature. For example, tree-shaped flows can be seen in computers, lungs, dendritic crystals, urban street patterns, and communication links. In this groundbreaking book, Adrian Bejan considers the design and optimization of engineered systems and discovers a deterministic principle of the generation of geometric form in natural systems. Shape and structure spring from the struggle for better performance in both engineering and nature. This idea is the basis of the new constructal theory: the objective and constraints principle used in engineering is the same mechanism from which the geometry in natural flow systems emerges. From heat exchangers to river channels, the book draws many parallels between the engineered and the natural world. Among the topics covered are mechanical structure, thermal structure, heat trees, ducts and rivers, turbulent structure, and structure in transportation and economics. The numerous illustrations, examples, and homework problems in every chapter make this an ideal text for engineering design courses. Its provocative ideas will also appeal to a broad range of readers in engineering, natural sciences, economics, and business.

Constructal Human Dynamics, Security and Sustainability

Adrian Bejan
Constructal Human Dynamics Security and Sustainability Book PDF

Author : Adrian Bejan
Publisher : IOS Press
Page : 188 pages
File Size : 46,7 Mb
Release : 2009
Category : Nature
ISBN : 9781586039592

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Constructal Human Dynamics, Security and Sustainability by Adrian Bejan Pdf

Globalization, security infrastructure and energy sustainability can be designed based on a scientific principle. This book approaches these objectives based on constructal theory, which means to design such projects as global 'flow' architectures that are 'alive' with movement of personnel, equipment, information, and education."

Complexity and Complex Thermo-Economic Systems

Stanislaw Sieniutycz
Complexity and Complex Thermo Economic Systems Book PDF

Author : Stanislaw Sieniutycz
Publisher : Elsevier
Page : 415 pages
File Size : 40,8 Mb
Release : 2019-11-24
Category : Computers
ISBN : 9780128185957

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Complexity and Complex Thermo-Economic Systems by Stanislaw Sieniutycz Pdf

Complexity and Complex Thermoeconomic Systems describes the properties of complexity and complex thermo-economic systems as the consequence of formulations, definitions, tools, solutions and results consistent with the best performance of a system. Applying to complex systems contemporary advanced techniques, such as static optimization, optimal control, and neural networks, this book treats the systems theory as a science of general laws for functional integrities. It also provides a platform for the discussion of various definitions of complexity, complex hierarchical structures, self-organization examples, special references, and historical issues. This book is a valuable reference for scientists, engineers and graduated students in chemical, mechanical, and environmental engineering, as well as those in physics, ecology and biology, helping them better understand the complex thermodynamic systems and enhance their technical skills in research. Provides a lucid presentation of the dynamical properties of thermoeconomic systems Includes original graphical material that illustrates the properties of complex systems Written by a first-class expert in the field of advanced methods in thermodynamics

Heat Transfer

Adrian Bejan
Heat Transfer Book PDF

Author : Adrian Bejan
Publisher : John Wiley & Sons
Page : 612 pages
File Size : 52,8 Mb
Release : 2022-03-22
Category : Technology & Engineering
ISBN : 9781119467434

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Heat Transfer by Adrian Bejan Pdf

HEAT TRANSFER Provides authoritative coverage of the fundamentals of heat transfer, written by one of the most cited authors in all of Engineering Heat Transfer presents the fundamentals of the generation, use, conversion, and exchange of heat between physical systems. A pioneer in establishing heat transfer as a pillar of the modern thermal sciences, Professor Adrian Bejan presents the fundamental concepts and problem-solving methods of the discipline, predicts the evolution of heat transfer configurations, the principles of thermodynamics, and more. Building upon his classic 1993 book Heat Transfer, the author maintains his straightforward scientific approach to teaching essential developments such as Fourier conduction, fins, boundary layer theory, duct flow, scale analysis, and the structure of turbulence. In this new volume, Bejan explores topics and research developments that have emerged during the past decade, including the designing of convective flow and heat and mass transfer, the crucial relationship between configuration and performance, and new populations of configurations such as tapered ducts, plates with multi-scale features, and dendritic fins. Heat Transfer: Evolution, Design and Performance: Covers thermodynamics principles and establishes performance and evolution as fundamental concepts in thermal sciences Demonstrates how principles of physics predict a future with economies of scale, multi-scale design, vascularization, and hierarchical distribution of many small features Explores new work on conduction architecture, convection with nanofluids, boiling and condensation on designed surfaces, and resonance of natural circulation in enclosures Includes numerous examples, problems with solutions, and access to a companion website Heat Transfer: Evolution, Design and Performance is essential reading for undergraduate and graduate students in mechanical and chemical engineering, and for all engineers, physicists, biologists, and earth scientists.

Theory in the "Post" Era

Christian Moraru,Andrei Terian,Alexandru Matei
Theory in the Post Era Book PDF

Author : Christian Moraru,Andrei Terian,Alexandru Matei
Publisher : Bloomsbury Publishing USA
Page : 376 pages
File Size : 47,9 Mb
Release : 2021-08-26
Category : Literary Criticism
ISBN : 9781501358975

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Theory in the "Post" Era by Christian Moraru,Andrei Terian,Alexandru Matei Pdf

Theory in the "Post" Era brings together the work and perspectives of a group of Romanian theorists who discuss the morphings of contemporary theory in what the editors call the “post” era. Since the Cold War's end and especially in the third millennium, theorists have been exploring the aftermath - and sometimes just the “after” - of whole paradigms, the crisis or “passing” of anthropocentrism, the twilight of an entire ontological and cultural “condition,” as well as the corresponding rise of an antagonist model, of an “anti,” “meta,” or “neo” alternative, with examples ranging from “posthumanism” and “post-postmodernism” to “post-aesthetics,” “postanalog” interpretation or “digicriticism,” “post-presentism,” “post-memory,” “post-“ or “neo-critique,” and so forth. It is no coincidence, the contributors to this volume argue, that this “post” moment is also a time when theory is practiced as a world genre. If theory has always been a “worlded” enterprise, a quintessentially communal, cross-cultural and international project, this is truer at present than ever. Perhaps more than other humanist constituencies, today's theorists work and belong in a theory commons that is transnational if still uneven economically, politically, and otherwise. Theory in the "Post" Era reports the results of Romanian theory experiments that join efforts made in other places to foster a theory for the “post” age.