Pulsatile flow and mass transport past a circular cylinder

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dc.contributor.author Zierenberg, JR en
dc.contributor.author Fujioka, H en
dc.contributor.author Suresh, Vinod en
dc.contributor.author Bartlett, RH en
dc.contributor.author Hirschl, RB en
dc.contributor.author Grotberg, JB en
dc.date.accessioned 2011-09-04T21:15:03Z en
dc.date.issued 2006 en
dc.identifier.citation Physics of Fluids 18(1):15 pages Article number 013102 2006 en
dc.identifier.issn 1070-6631 en
dc.identifier.uri http://hdl.handle.net/2292/7574 en
dc.description Copyright 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Fluids 18(1):15 pages Article number 013102 2006 and may be found at http://dx.doi.org/10.1063/1.2164475. en
dc.description.abstract The mass transport of a pulsatile free-stream flow past a single circular cylinder is investigated as a building block for an artificial lung device. The free stream far from the cylinder is represented by a time-periodic (sinusoidal) component superimposed on a steady velocity. The dimensionless parameters of interest are the steady Reynolds number (Re), Womersley parameter (α), sinusoidal amplitude (A), and the Schmidt number (Sc). The ranges investigated in this study are 5 ⩽ Re ⩽ 40, 0.25 ⩽ α ⩽ 4, 0.25 ⩽ A ⩽ 0.75, and Sc = 1000. A pair of vortices downstream of the cylinder is observed in almost all cases investigated. These vortices oscillate in size and strength as α and A are varied. For α<αc, where αc = 0.005A−1.13Re1.33, the vortex is always attached to the cylinder (persistent); while for α>αc, the vortex is attached to the cylinder only during part of a time cycle (intermittent). The time-averaged Sherwood number, , is found to be largely influenced by the steady Reynolds number, increasing approximately as Re1/2. For α = 0.25, is less than the steady (α = 0, A = 0) value and decreases with increasing A. For α = 2 and α = 4, is greater than the steady value and increases with increasing A. These qualitatively opposite effects of pulsatility are discussed in terms of quasisteady versus unsteady transport. The maximum increase over steady transport due to pulsatility varies between 14.4% and 20.9% for Re = 10-40, α = 4, and A = 0.75. en
dc.publisher American Institute of Physics en
dc.relation.ispartofseries Physics of Fluids en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/1070-6631/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.title Pulsatile flow and mass transport past a circular cylinder en
dc.type Journal Article en
dc.identifier.doi 10.1063/1.2164475 en
pubs.issue 1 en
pubs.volume 18 en
dc.rights.holder Copyright: 2006 American Institute of Physics en
pubs.author-url http://pof.aip.org/resource/1/phfle6/v18/i1/p013102_s1 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Article en
pubs.elements-id 80857 en
pubs.org-id Bioengineering Institute en
pubs.org-id ABI Associates en
pubs.org-id Engineering en
pubs.org-id Engineering Science en
pubs.org-id Science en
pubs.org-id Science Research en
pubs.org-id Maurice Wilkins Centre (2010-2014) en
pubs.number 013102 en
pubs.record-created-at-source-date 2010-09-01 en

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