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dc.contributor.authorBellofiore, Alessandro
dc.contributor.authorDonohue, Eilis M.
dc.contributor.authorQuinlan, Nathan J.
dc.date.accessioned2013-05-20T09:44:00Z
dc.date.available2013-05-20T09:44:00Z
dc.date.issued2011-07
dc.identifier.citationAlessandro Bellofiore, Eilis M Donohue, Nathan J Quinlan (2011) 'Scale-up of an unsteady flow field for enhanced spatial and temporal resolution of PIV measurements: application to leaflet wake flow in a mechanical heart valve'. Experiments In Fluids, 51 (1):161-176.en_US
dc.identifier.issn1432-1114
dc.identifier.urihttp://hdl.handle.net/10379/3441
dc.description.abstractA scale-up approach is developed to enhance effective spatial and temporal resolution of PIV measurements. An analysis shows that complete similarity can be maintained for certain unsteady flows and that all types of error in PIV are either reduced or unaffected by scale-up. Implementation and results are described for flow through a mechanical heart valve (MHV), in which high resolution is necessary to advance understanding of the effects of small-scale flow structure on blood cells. With a large-scale model geometry and a low-viscosity model fluid, spatial and temporal resolutions are increased by factors of 5.8 and 118, respectively, yielding the finest resolution to date for MHV flow. Measurements near the downstream tip of a valve leaflet detect eddies as small as 400 ¿m shed in the leaflet wake. Impulsively started flow exhibits vortex shedding frequencies broadly consistent with the literature on flat-plate and aerofoil wakes, while the physiological unsteady flow waveform promotes 40% higher frequency at peak flow.en_US
dc.description.sponsorshipScience Foundation Ireland [Research Frontiers Programme]; Higher Education Authority [Programme for Research in Third-Level Institutions]en_US
dc.formatapplication/pdfen_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofExperiments In Fluidsen
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Ireland
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/3.0/ie/
dc.subjectLarge-scale model valveen_US
dc.subjectParticle-image velocimetryen_US
dc.subjectMechanically-induced blood damageen_US
dc.titleScale-up of an unsteady flow field for enhanced spatial and temporal resolution of PIV measurements: application to leaflet wake flow in a mechanical heart valveen_US
dc.typeArticleen_US
dc.date.updated2013-05-16T15:12:56Z
dc.local.publishedsourcehttp://dx.doi.org/10.1007/s00348-010-1038-2en_US
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funder|~|
dc.internal.rssid4216605
dc.local.contactNathan Quinlan, Mechanical & Biomedical Eng, Eng-2042, New Engineering Building, Nui Galway. 2726 Email: nathan.quinlan@nuigalway.ie
dc.local.copyrightcheckedNo
dc.local.versionACCEPTED
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Attribution-NonCommercial-NoDerivs 3.0 Ireland
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Ireland