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Natural constructal emergence of vascular design with turbulent flow

dc.contributor.author Cetkin, E
dc.contributor.author Lorente, S
dc.contributor.author Bejan, A
dc.date.accessioned 2011-04-15T16:46:53Z
dc.date.issued 2010-06-01
dc.identifier.issn 0021-8979
dc.identifier.uri https://hdl.handle.net/10161/3368
dc.description.abstract Here, we show that vascular design emerges naturally when a volume is bathed by a single stream in turbulent flow. The stream enters the volume, spreads itself to bathe the volume, and then reconstitutes itself as a single stream before it exits the volume. We show that in the pursuit of a smaller global flow resistance and larger volumes, the flow architecture changes stepwise from a stack of identical elements bathed in parallel flow (like a deck of cards) to progressively more complex structures configured as trees matched canopy to canopy. The transition from one architecture to the next occurs at a precise volume size, which is identified. Each transition marks a decrease in the rate at which the global flow resistance increases with the volume size. This decrease accelerates as the volume size increases. The emergence of such vasculatures for turbulent flow is compared with the corresponding phenomenon when the flow is laminar. To predict this design generation phenomenon is essential to being able to scale up the designs of complex flow structures, from small scale models to life size models. The constructal law is a bridge between the principles of physics and biology. © 2010 American Institute of Physics.
dc.language.iso en_US
dc.publisher AIP Publishing
dc.relation.ispartof Journal of Applied Physics
dc.relation.isversionof 10.1063/1.3430941
dc.title Natural constructal emergence of vascular design with turbulent flow
dc.type Journal article
duke.contributor.id Bejan, A|0095916
dc.description.version Version of Record
duke.date.pubdate 2010-6-1
duke.description.issue 11
duke.description.volume 107
dc.relation.journal Journal of Applied Physics
pubs.begin-page 114901
pubs.issue 11
pubs.organisational-group Duke
pubs.organisational-group Mechanical Engineering and Materials Science
pubs.organisational-group Pratt School of Engineering
pubs.publication-status Published
pubs.volume 107


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