Wednesday, November 4, 2009

Constructal Theory

The constructal theory puts forth the idea that the generation of design (configuration, pattern, geometry) in nature is a physics phenomenon that unites all animate and inanimate systems, and that this phenomenon is covered by the Constructal Law stated by Adrian Bejan in 1996: "For a finite-size (flow) system to persist in time (to live), its configuration must evolve such that it provides easier access to the imposed currents that flow through it."

Interestingly so... the examples they use to define this theory includes BOTH water and blood.... 
Some domains of application
ApplicationWhat flowsTree channelsInterstitial spaces
Packages of electronicsHeatHigh-conductivity inserts (blades, needles)Low conductivity substrate
Urban trafficPeopleLow-resistance street car trafficStreet walking in urban structure
River basinsWaterLow-resistance rivulet and riversDarcy flow through porous media
LungsAirLow-resistance airways, bronchial passagesdiffusion in alveoli tissues
Circulatory systemBloodLow-resistance blood vessels, capillaries, arteries, veins
diffusion in capillaries tissues


Interstitial Space= "small opening or space between objects"

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