Body mass: the key to maximum speed ?

This article in French, from the October publication of Science & Vie, provides an interview of professor Adrian Bejan regarding the views of Constructal theory on animal movements.

The article present also in greater details the theory of Ulrich Brose on maximal animal speed.




La loi Constructale et sa place dans la thermodynamique

This french article has been published by Techniques de l’Ingénieur, and was written by Sylvie Lorente and Adrian Bejan.

The authors define and present the Constructal law as the law of physics that accounts for the natural tendency of all flow systems (animate or inanimate) to evolve into configurations that offer progressively greater flow access over time.

This article shows what make the Constructal law a part of thermodynamics, and that the domains covered by this new law of Physics are broad, ranging from fluid flows to heat and mass transfer.




Physics describes how income inequality happens…

 … but can it solve the problem ?

Jakky Kerubo interviews and discusses one of the last application of Constructal theory: explaining how income inequality happens… But this explanation is not the end game for Adrian Bejan, who is “working on the next question: how to make the distribution of assets less unequal. It involves regulation, but with greater non-monetary contribution from individuals“.


The art of tracking, forensics, and the Constructal Law

In this interview, Willem Larsen explores with Adrian Bejan what the Constructal Law can mean for a tracker, a subject he also further explored in several videos and interviews available online (cf. links here bellow).

In 2006, already A. Bejan and  D. Gobin opened this kind domain of research thanks to a paper focused on the explanation of droplet geometries: splashes vs. splats – with obvious links with forensics…


Design in Nature – round table at the Helix Center round table about “Design in Nature” took place Saturday, April 22nd, 2017 at 2:30pm, at the The Helix Center, NY.

Prof. Adrian Bejan was one the five participants, and exposed his views on this topic, on the basis of the constructal law of evolution in nature.


Evolution in thermodynamics

This review, published inApplied Physics Reviews, covers two aspects of “evolution” in thermodynamics. First, with the constructal law, thermodynamics is becoming the domain of physics that accounts for the phenomenon of evolution in nature, in general.

Second, thermodynamics (and science generally) is the evolving add-on that empowers humans to predict the future and move more easily on earth, farther and longer in time. The part of nature that thermodynamics represents is this: nothing moves by itself unless it is driven by power, which is then destroyed (dissipated) during movement.

Nothing evolves unless it flows and has the freedom to change its architecture such that it provides greater and easier access to the available space. Thermodynamics is the modern science of heat and work and their usefulness, which comes from converting the work (power) into movement (life) in flow architectures that evolve over time to facilitate movement.

I also review the rich history of the science, and I clarify misconceptions regarding the second law, entropy, disorder, and the arrow of time, and the supposed analogy between heat and work.


  • A. Bejan, Evolution in thermodynamicsApplied Physics Reviews 4 , 011305 (2017); doi: 10.1063/1.4978611