What is a classic book?


In this online article, Peder Zane, co-author of the book “Design in Nature“, discusses the origin of the concept of “classic books”, and how it emerges as a flow architecture.

The constructal law shows that lists of great or classic books are hierarchical designs that arise naturally to organize the swelling flow of literature.


Every snowflake is not unique

SnowflakeProfessor Bejan explain in this article from Mechanical Engineering, why every snowflake is not unique about its principle, the constructal law.

Every snowflake conforms to only one architecture: a flat star with six fishbones connected at the center.

What’s more, that structure is predictable provided that we recognize the underlying principle: first, that something flows, in this case heat, and, second, that the natural tendency of all flows is to evolve
into architectures that provide easier access.

It’s another example of the constructal law.






Evolution as Physics: A bird? A plane? It’s all physics

Airplanes evolutionThe paper, “The evolution of airplanes,”created a media stir earlier this year when it was published online by the Journal of Applied Physics. The authors contend that the  similarities seen across aircraft designs are a manifestation of the same law that drives the evolution of biological creatures and terrain features like river basins.

Lead author Adrian Bejanof Duke University describes the methodology behind the paper and the predictive value of the constructal law, the theory he developed 19 years ago to explain the “oneness” he sees in the evolution of living and non-living systems.

Constructal Law & Second Law Conference

Constructal Thermodynamics 18-19 May 2015   Parma, Italy   


Early registration: 15 November 2014

The Constructal Law governs the phenomena of design and evolution in nature. The conference explores the unifying power of the Constructal Law and its applications in all the domains of design generation and evolution, from biology and geophysics to social organization, energy sustainability and security.

The conference also covers the Second Law, and how the Constructal Law fits in thermodynamics. The Constructal Law and the Second Law are self-standing as first principles. Together, they empower science much more than the Second Law alone.


The evolution of airplanes

Airplanes Figure 1Abstract: The prevailing view is that we cannot witness biological evolution because it occurred on a time scale immensely greater than our lifetime. Here, we show that we can witness evolution in our lifetime by watching the evolution of the flying human-and-machine species: the airplane.

We document this evolution, and we also predict it based on physics principles. We show that the airplanes must obey theoretical allometric rules that unite them with the birds and other animals. For example, the larger airplanes are faster, more efficient as vehicles, and have greater range.

The engine mass is proportional to the body size: this scaling is analogous to animal design, where the mass of the motive organs (muscle, heart, lung) is proportional to the body size. Large or small, airplanes exhibit a proportionality between wing span and fuselage length, and between fuel load and body size. The animal-design counterparts of these features are evident. The view that emerges is that the evolution phenomenon is broader than biological evolution. The evolution of technology, river basins, and animal design is one phenomenon, and it belongs in physics.