Constructal thermodynamics

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Thermodynamics is brief, simple, unambiguous and improving. Yet, confusion reigns in the field. The word "entropy" is pasted on almost any new thing, without any respect for its proper definition in thermodynamics. Every author bows to his own maximum or minimum principle, even when it contradicts English, not just thermodynamics. Minimizing resistance cannot be the same as maximizing resistance. Minimizing entropy generation cannot be the same as maximizing entropy generation. Because of the word "entropy", many believe that entropy generation minimization and maximization are covered by the second law, which is incorrect, twice. Because for an isolated system (or an adiabatic closed system) the second law states that the system entropy inventory increases during changes inside the system, many believe that the second law accounts for organization, evolution, and the arrow of time. This too is incorrect. It is time for a reality check, and this means to take a look at nature, at the physics, at the science of all the natural things that "happen". Here then is a review of the few, the noble, the laws with which in science we cover the few distinct phenomena that nature is made of.






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Bejan, A (2016). Constructal thermodynamics. International Journal of Heat and Technology, 34. pp. S1–S8. 10.18280/ijht.34S101 Retrieved from

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Adrian Bejan

J.A. Jones Distinguished Professor of Mechanical Engineering

Professor Bejan was awarded the Benjamin Franklin Medal 2018 and the Humboldt Research Award 2019. His research covers engineering science and applied physics: thermodynamics, heat transfer, convection, design, and evolution in nature.

He is ranked among the top 0.01% of the most cited and impactful world scientists (and top 10 in Engineering world wide) in the 2019 citations impact database created by Stanford University’s John Ioannidis, in PLoS Biology.  He is the author of 30 books and 700 peer-referred articles. His h-index is 111 with 92,000 citations on Google Scholar. He received 18 honorary doctorates from universities in 11 countries.

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