Navigation Links
Unifying the animate and the inanimate designs of nature
Date:4/28/2009

DURHAM, N.C. -- Living beings and inanimate phenomena may have more in common than previously thought.

At least that is the view of Duke University engineer Adrian Bejan and Penn State biologist James Marden.

What they believe connects the two worlds is a theory that flow systems from animal locomotion to the formation of river deltas -- evolve in time to balance and minimize imperfections. Flows evolve to reduce friction or other forms of resistance, so that they flow more easily with time. This view has been termed the constructal law, which Bejan first stated 13 years ago.

With the help of Marden, Bejan believes that he has now unified both the biological and geophysical principles of nature's design through the constructal law, which can also be viewed as the physics of evolution.

"This is an exciting development for physicists, but it should also resonate with biologists," Bejan said. "The idea that organic evolution is analogous to the way form evolves in inanimate flow systems is a novel concept that has the potential to unite perspectives and approaches across disparate disciplines. We suggest that the constructal law provides a powerful tool for examining and understanding variation in both the animate and inanimate compartments of nature."

The team's findings were published online in the journal Physics of Life Reviews. It was supported by the U.S. Air Force Office of Scientific Research and the National Science Foundation.

The story began with the two scientists trying to determine if the same laws applied to two very different forms of locomotion -- the swimming of fish and the running or flying of animals. The commonly held belief among biologists was that fish locomotion was different than other animal locomotion. Since they live in water, the conventional wisdom held, fish were different because they would not be subject to gravity.

The way Bejan saw it, birds and animals could be seen as weight-lifters, since their means of locomotion required effort with an unyielding base the ground and a limitless top the air. He argued that as fish swim, they too have an unyielding floor the sea bed. Hence, water flowed over and around them like the air over runners and flyers.

So, fish too were weight-lifters, and these forms of locomotion are predicted by the constructal law, Bejan said.

"Our discovery that animal locomotion adheres to the constructal law tells us that even though you couldn't predict exactly what animals would look like if you started evolution over on Earth, or it happened on another planet with a given gravity and density of their tissues, the same basic patterns of their design would evolve again," Marden said.

In numerous papers over past decade, Bejan has demonstrated that the constructal law predicts the design of a wide range of flow systems seen in nature, from biology and geophysics to social dynamics and technology evolution.

"When thinking of evolution and Darwin, most people think of animals or trees," Bejan said. "That's too bad, because design features are everywhere in nature. The constructal law can be seen as a universal principle of evolution, which applies in many fields, from physics to economics."

He describes the law as an animated movie, where one screen is replaced by another screen on which the currents flow with greater ease. He sees the constructal law (www.constructal.org) as the time direction of the movie, flow configurations (designs, drawings) that flow more easily."

"The constructal law can be seen to cover 'natural design' phenomena across the board," Bejan said, "as a compact summary of common observations, the tape of evolution running in one direction, which may be expressed in physics terms simply as: time and configuration."


'/>"/>

Contact: Richard Merritt
richard.merritt@duke.edu
919-660-8414
Duke University
Source:Eurekalert  

Related biology news :

1. TheVisualMD.com launches new animated 3-D views of human body in action
2. University of Miami engineer designs stretchable electronics with a twist
3. Humans may be losers if technological nature replaces the real thing
4. 2009 Signature Genomic Laboratories Travel Award winner announced
5. CHIs 5th Biomarker World Congress: Signature Event with Cutting-Edge Agenda
6. Study suggests salt might be natures antidepressant
7. Unfolding natures origami
8. Freaks help scientist unravel nature and nurture
9. Experiment of nature examines how mothers diet may impact on childs health
10. Stroma genomic signature predicts resistance to anthracyclin-based chemotherapy in breast cancer
11. Ecologists report quantifiable measures of natures services to humans
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Unifying the animate and the inanimate designs of nature
(Date:2/2/2016)... 2, 2016 This BCC Research report ... by reviewing the recent advances in high throughput ... the field forward. Includes forecast through 2019. ... challenges and opportunities that exist in the bioinformatic ... developers, as well as IT and bioinformatics service ...
(Date:2/1/2016)... BURNABY, Canada , February 1, 2016 ... new technological advancements to drive global touchfree intuitive gesture ...   --> Rising sales of consumer electronics ... intuitive gesture control market size ... of consumer electronics coupled with new technological advancements to ...
(Date:1/25/2016)... Pa. , Jan. 25, 2016   Unisys Corporation ... system at John F. Kennedy (JFK) International Airport, New ... Protection (CBP) identify imposters attempting to enter the ... not belong to them. pilot testing of the ... initially at three terminals at JFK during January 2016. --> ...
Breaking Biology News(10 mins):
(Date:2/9/2016)... BOSTON , Feb. 9, 2016 ... a data-driven, biological research approach, has announced the ... Financial Officer and Chief Operating Officer. Haddock brings ... corporate finance, including 12 years in senior financial ... global experience in business organizational management. ...
(Date:2/8/2016)... 8, 2016 --> ... an innovation-driven oncology company developing next generation cancer ... today announced that chairman emeritus of Tata Sons ... the company as part of the first close ... investors Navam Capital and Aarin Capital. ...
(Date:2/8/2016)... ... 2016 , ... Bulk food product inspection systems are specifically ... of the production process. Despite frequently inspecting loose product prior to packaging, product ... as sacks of dry powders. , Mettler-Toledo Product Inspection's brand-new white paper entitled ...
(Date:2/8/2016)... BATH, England , February 8, 2016 ... Genetics Ltd ("Atlas Genetics" or the "Company"), the ultra-rapid Point-Of-Care ... approval to CE Mark its Chlamydia trachomatis (CT) test to ... requirements of the IVD Directive (98/79/EC), the CT test is ... --> --> The launch of the ...
Breaking Biology Technology: