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Rolling stones and turbulent eddies: why the bigger live longer and travel farther.

dc.contributor.author Bejan, Adrian
dc.coverage.spatial England
dc.date.accessioned 2017-08-09T02:08:11Z
dc.date.available 2017-08-09T02:08:11Z
dc.date.issued 2016-02-17
dc.identifier https://www.ncbi.nlm.nih.gov/pubmed/26883787
dc.identifier srep21445
dc.identifier.uri https://hdl.handle.net/10161/15200
dc.description.abstract Here we report the discovery that even the simplest, oldest and most prevalent forms of evolutionary movement--rolling bodies and whirls of turbulence--exhibit the same body-size effect on life time and life travel as the evolutionary movement united by the body-size effect so far: animals, rivers, vehicles, jets and plumes. In short, the bigger should last longer and travel farther. For rolling bodies, the life span (t) and the life travel (L) should increase with the body mass (M) raised to the powers 1/6 and 1/3, respectively. The number of rolls during this movement is constant, independent of body size. For an eddy of turbulence, t should increase with the eddy mass (M) raised to the power 2/3, while L should increase with M(2/3) times the bulk speed of the turbulent stream that carries the eddy. The number of rolls during the eddy life span is a constant independent of eddy size.
dc.language eng
dc.publisher Springer Science and Business Media LLC
dc.relation.ispartof Sci Rep
dc.relation.isversionof 10.1038/srep21445
dc.title Rolling stones and turbulent eddies: why the bigger live longer and travel farther.
dc.type Journal article
duke.contributor.id Bejan, Adrian|0095916
pubs.author-url https://www.ncbi.nlm.nih.gov/pubmed/26883787
pubs.begin-page 21445
pubs.organisational-group Duke
pubs.organisational-group Mechanical Engineering and Materials Science
pubs.organisational-group Pratt School of Engineering
pubs.publication-status Published online
pubs.volume 6
dc.identifier.eissn 2045-2322


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