Talk:Constructal law

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Falsifiable Hypothesis[edit]

What, if any, falsifiable hypothesis does this theory make? --Lbeaumont (talk) 18:28, 23 April 2013 (UTC)

Leonardo da Vinci's rule[edit]

The article claims that constructal law predicts Leonardo da Vinci's rule. This probably refers to Leonardo da Vinci's tree rule. See: However, the constructal law prediction seems to be based on hydraulics, which seems to be refuted by the article at: So my questions are these:

  • Is the constructal law article referring to Leonardo da Vinci's tree rule?
  • Is the prediction based on hydraulic considerations?
  • Do hydraulic considerations explain Leonardo da Vinci's tree rule?
  • Is Leonardo da Vinci's tree rule true?

Thanks! --Lbeaumont (talk) 20:07, 23 April 2013 (UTC)

NPOV language and WP:UNDUE[edit]

I've got some concerns about this article both for violations of WP:NPOV in its presentation of this theory and WP:UNDUE with the weight given to sparse support in an article which seems to govern a notable WP:FRINGE topic. I've added tags and am bringing this to the attention of the NPOV noticeboard in hopes some people with more Physics experience than mine can lend a hand fixing. Simonm223 (talk) 16:50, 19 February 2014 (UTC)

I also contacted the Quality Control noticeboard of the WikiProject Physics group. Simonm223 (talk) 16:57, 19 February 2014 (UTC)

A classic example of a "fringe theory given undue weight"[edit]

This "article" and the personal polemics contained here read like a pamphlet written by the author to promote his original research. The so-called "constructal law" is a fringe theory heavily promoted by a single individual and virtually no one else. Most references listed here are to Mr Bejan himself and/or his students. The "constructal law" borders on pseudoscience: the formulation is as vague as it is untestable. It fails to make any meaningful predictions, and I mean _original_ predictions in areas which have _not_ been already resolved by others (Horton, Kleiber). Presenting insights worked out by others in the context of one's "theory" is _not_ a prediction, but merely a re-formulation (at best). / WP:FRINGE/PS / WP:PROFRINGE / WP:NFRINGE / WP:UNDUE

I very much concur. I see MreEnv has replaced theory with law, too, which is undeniably inappropriate. Said user continues to inject this stuff into other, unrelated pages as well. (talk) 03:37, 16 July 2014 (UTC)

Inappropriate external links[edit]

I have moved the following links from the EL section because they may make good sources for article content but are inappropriate as ELs.

Jojalozzo 14:26, 20 July 2014 (UTC)

Possible sources[edit]

The following list of sources was included in the article in a "Popular literature" section. They should either be used as sources to support article content or dropped.

  • Maggie Wittlin, "A Finger on the Pulse of the World", SEED Magazine, January 13, 2006.
  • H. Poirier, Une théorie explique l’intelligence de la nature, Science & Vie, 1034, 2003, pp. 44–63.
  • Natural Design with Constructal Theory, Mechanical Engineering magazine, [6]
  • The many and the few, Mechanical Engineering magazine, [7]
  • Laufen = Fliegen = Schwimmen, [8]
  • Jeremy Berlin, Gaudi’s Materspiece, National Geographic, December 2010, pp. 24–27.
  • Tara Bruno, Higher Navel, faster feet, Science World, October 18, 2010, Vol. 67, No. 3, p. 5.
  • A. Boyle, Why March Madness isn’t that mad, MSNBC, 2 March 2011.
  • Jonathan Mitchell, Constructal Law: A Theory of Everything, Studio 360, 2 March 2012.
  • S. Pappas, Fastest swimmers make webbed hands out of water, Live Science, 20 June 2012.
  • M. Torre, “La Natura, vi svelo le formule della perfezione”, La Macchina del Tempo, January – February 2004, No. 1–2, Year 5, pp. 36–46.
  • “La Tour Eiffel a livré son equation”, Interview with A. Bejan, Science & Vie, No. 1050, March 2005, pp. 18–19.
  • “Evolution of Movement Design is Deterministic”, Interview with A. Bejan, Astrobiology Magazine, 31 December 2005.
  • “Traquers de formes: Quand les morphologues réinventent la nature” (Pursuers of shapes: when the morphologists reinvent nature), Science & Vie, No. 1067, August 2006, Supplement, pp. 47–50.
  • R. Bliwise, “Going With the Flow”, DUKE Magazine, September–October 2007, pp. 32–29.
  • P. J. Zane, Going with the flow, The News & Observer, Raleigh, 30 December 2007.
  • J. J. Hermes, “Fixed Rankings?”, The Chronicle of Higher Education, Vol. 54, Issue 27, Page A6, 14 March 2008.
  • Fabienne Lemarchand, La pyramide ou la géometrie du moindre effort (The Pyramid or the geometry of least effort), Les Cahiers de Science & Vie, No. 106, August–September 2008, pp. 52–61.
  • R. R. Britt, Is Einstein the last great genius? Yahoo News, 5 December 2008,
  • M. Lord, Capstone Redesign, Prism, April 2009, pp. 45–47.
  • K. McVeigh, “The bigger they get, the faster they go – the rise of the superhuman athlete”, The Guardian, 17 July 2009.
  • R. Alleyne, “Size matters: bigger athletes dwarf efforts of smaller rivals”, The Daily Telegraph, 17 July 2009.
  • Elizabeth Cooney, “The quickest grow fastest”, The Boston Globe, 20 July 2009.
  • “Higher, taller, faster: study suggests”, Vancouver Sun, 20 July 2009.
  • R. Boswell, “The skinny on today’s Olympic athletes”, National Post, Canada, 20 July 2009.
  • Lee Dye, “Are giants taking over sports?”, ABC News, 22 July 2009.
  • Emanuela di Pasqua, “Generazione di fenomeni <<crescono>>”, Corriere della Sera, 17 July 2009.
  • Paola Mariano, Nuoto e corsa/ Atleti più veloci? La causa e il fisico “ingigantito”,, 17 June 2009.
  • Elizabeth Landau, Olympic speed winners getting taller, heavier,, 5 August 2009.
  • Matthew Futterman, Behind the NFL’s touchdown binge, The Wall Street Journal, 10 September 2009, p. D8.
  • Steve Connor, Why some shapes are more pleasing to the eye than others, The Independent, London, UK, 21 December 2009.
  • Karen McVeigh, Why golden ratio pleases the eye: US academic says he knows art secret, The Guardian, London, UK, 28 December 2009.
  • Paola Mariano, Cervello: nei nostri occhi il segreto bellezza opere d’arte, l’Unità, Italy, 21 December 2009.
  • Massimo Piattelli-Palmarini, Così occhio e mente cologno la bellezza, Corriere della Sera, 12 January 2010, p. 36.
  • Frédérique Doyon, Le secret de la beauté démystifié, Le Devoir, Montreal, 21 January 2010.
  • Matthew Moore, Centre of gravity theory for dominance of black sprinters and white swimmers, The Daily Telegraph, 12 July 2010.
  • Karin Zeitvogel, Belly-buttons key to success in sport: study, Yahoo News, 12 July 2010.
  • Karen Rowan, Scientists theorize why black athletes run fastest, Live Science, 13 July 2010.
  • William Saletan, Lose the race. Can the black-white performance gap be hereditary but not racial? Slate, 13 July 2010.
  • Jeannine Stein, The key to an athlete’s speed may be the body’s center of gravity, Los Angeles Times, Health, 12 July 2010.
  • L. Valich, Just go with the flow to pick March Madness winners, Medill Reports, 1 March 2011.
  • E. Brennan, Circular evolution in the NCAA tournament, ESPN, 3 March 2011.
  • C. Arnold, Universal Law of Basketball, US News & World Report, 21 March 2011.
  • Lindsey Emery, Athletic blessings in disguise, ESPN W, 11 May 2011
  • Pourquoi les coureurs d’origine africaine sont-ils meilleurs que les autres?, Science et Vie, July 2011, pp. 126–129.
  • Esses are everywhere, Science Daily, 20 July 2011.
  • Seeing the S-curve in everything, Science Codex, 20 July 2011.
  • A. W. Kosner, There’s a new law in physics and it changes everything, Forbes, 29 February 2012.
  • A. W. Kosner, “Freedom is good for design”, How to use Constructal Theory to liberate any flow system, Forbes, 18 March 2012.
  • Moira Gunn, TechNation: Adrian Bejan—The Nature of Design, IT Conversations, 22 March 2012.
  • A. Bejan and J. P. Zane, In design, nature goes with the flow, News & Observer, 8 May 2012.
  • Sharon Begley, Newton at the Games: Sports science, Reuters, 16 July 2012.
  • Sharon Begley, Faster Olympic swimmers paddle like a duck, kick like a dolphin, Reuters, 18 July 2012.
  • Matthew Futterman, Bodies built for Gold, The Wall Street Journal, 27 July 2012.
  • Natalie Wolchover, What are the ingredients of an Olympian?, Life’s Little Mysteries, 30 July 2012.
  • Pauline Gravel, La physique constructale à l′épreuve de l′eau?, Le Devoir, Montreal, 31 July 2012.
  • Karin Zeitvogel, SPORTS: Researchers point to fingers as key to speed in the water, WaterWonksBeta, 2 August 2012.
  • Lee Charles Kelley and Kevin Behan, Empathy & evolution: how dogs convert stress into flow, Psychology Today, 6 August 2012.
  • Michael Donlevy, Could your child be an Olympian?, Yano, 15 August 2012.
  • A. W. Kosner, Big data not required: the benefits of a less complex model of climate change, Forbes, 12 October 2012.
  • L. C. Kelley, The canine mind bows to the Constructal Law, Psychology Today 16 October 2012.
  • The Week, UK, The Hobbit film leaves fans with an unexpected thickness, 2 December 2012.
  • Max Borders, The most important idea you probably didn’t know about, The Freeman, 31 January 2013.
  • A. W. Kosner, The (not so) evil strategy behind everything Google, Forbes, 3 February 2013.
  • L. C. Kelly, Hierarchies without dominance: The pack as a flow system?, Psychology Today, 8 February 2013.
  • Lance Hosey, Why We Love Beautiful Things, New York Times, 15 February 2013.
  • Phil Patton, Designers of Aston-Martin Rapide S Embrace Golden Ratio, New York Times, 20 February 2013.
  • A. W. Kosner, The Sports Car, The Laptop And The Science Behind The Golden Proportion, Forbes, 22 February 2013.
  • Matthew Futterman, Here Come The Flamethrowers, The Wall Street Journal, 29 March 2013, pp. D1-D2.
  • Ira Katz A Law for Almost Everything, American Daily Herald, 3 June 2013.
  • Richard Merritt, In baseball, bigger is better, 8 July 2013
  • Laura Candler, Why baseball pitchers (and other athletes) are getting taller, WUNC Science and Technology, 10 July 2013.
  • Through the Wormhole, with Morgan Freeman: Did God Create Evolution?, Science Channel, 31 July 2013.
  • Karl Gruber, Spreading your fingers improves your swimming, The Munich Eye, 9 September 2013.
  • A. W. Kosner, Winter wonderland: Snowflakes are predictably diverse, but not unique, Forbes, 22 December 2013.
  • Stephanie Pappas, How snowflakes form: new video explains, Live Science, 23 December 2013.
  • Matthew Futterman, Imperfect bodies chase gold, The Wall Street Journal, 7 February 2014.

Jojalozzo 14:31, 20 July 2014 (UTC)

List of examples in desperate need of sources[edit]

The list of examples of natural designs explained and unified by constructal law in the Constructal thermodynamics section had no sources. Such a long list with zero citations is a significant abuse of policy. I have moved the list here for holding so they can be moved back as sources are provided.

  • Global circulation and climate
  • River basin design: Horton's rules of stream numbers (~4) and lengths (~2), and all the other scaling rules (e.g., Melton, Hack) of river basins all over the world.
  • The distribution of city sizes and numbers, i.e. Zipf's law relating log (size) versus log (rank).
  • The distribution of tree sizes and numbers on the forest floor, which is also a Zipf line of log (size) versus log (rank).
  • The flow of education as a morphing vasculature on the globe, and the rigidity of university rankings.
  • Vision, cognition, and the "golden ratio" phenomenon.
  • The entire architecture of vegetation: roots, trunks, canopies, branches, leaves, and the forest, including the prediction of Leonardo da Vinci's rule, Huber's rule, and the Fibonacci sequence.
  • Pedestrian movement, speeds, and patterns
  • The emergence of urban traffic design
  • The entire morphogenesis of dendritic crystals (e.g., snowflakes), as a flow structure that facilitates the flow of the heat of solidification
  • The scaling law of all animal locomotion (running, flying, swimming): speeds, frequencies, forces and the work spent per unit of mass moved and distance traveled.
  • The evolution of speed in sports.
  • Kleiber's law, the relationship between metabolic rate and body size
  • The relationship between breathing and heart beating times and body size
  • The relationship between the mass transfer contact area and body mass
  • The human bronchial tree with 23 levels of bifurcation.
  • The dimensions of the alveolar sac,
  • The total length of the airways,
  • The total alveolar surface area,
  • The total resistance to oxygen transport in the respiratory tree.

Jojalozzo 01:10, 25 July 2014 (UTC)

working on it Mre env (talk) 20:32, 20 August 2014 (UTC)
I believe this issue has been addressed and the examples were restored.Mre env (talk) 02:17, 26 August 2014 (UTC)