Experimental unsteady flow study in a patient-specific abdominal aortic aneurysm model

Stamatopoulos, C; Mathioulakis, DS; Papaharilaou, Y; Katsamouris, A

dc.contributor.author	Stamatopoulos, C	en
dc.contributor.author	Mathioulakis, DS	en
dc.contributor.author	Papaharilaou, Y	en
dc.contributor.author	Katsamouris, A	en
dc.date.accessioned	2014-03-01T01:35:40Z
dc.date.available	2014-03-01T01:35:40Z
dc.date.issued	2011	en
dc.identifier.issn	0723-4864	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21159
dc.subject	Abdominal Aortic Aneurysm	en
dc.subject	Flow Rate	en
dc.subject	Unsteady Flow	en
dc.subject	Velocity Field	en
dc.subject	Shear Stress	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.classification	Mechanics	en
dc.subject.other	WALL SHEAR-STRESS	en
dc.subject.other	CAROTID-ARTERY BIFURCATION	en
dc.subject.other	VELOCITY-MEASUREMENTS	en
dc.subject.other	PULSATILE FLOW	en
dc.subject.other	BLOOD-FLOW	en
dc.subject.other	ATHEROSCLEROSIS	en
dc.subject.other	HEMODYNAMICS	en
dc.subject.other	EXERCISE	en
dc.subject.other	CHANNEL	en
dc.subject.other	STEADY	en
dc.title	Experimental unsteady flow study in a patient-specific abdominal aortic aneurysm model	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s00348-010-1034-6	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s00348-010-1034-6	en
heal.language	English	en
heal.publicationDate	2011	en
heal.abstract	The velocity field in a patient-specific abdominal aneurysm model including the aorto-iliac bifurcation was measured by 2D PIV. Phase-averaged velocities obtained in 14 planes reveal details of the flow evolution during a cycle. The aneurysm expanding asymmetrically toward the anterior side of the aorta causes the generation of a vortex at its entrance, covering the entire aneurysm bulge progressively before flow peak. The fluid entering the aneurysm impinges on the left side of its distal end, following the axis of the upstream aorta segment, causing an increased flow rate in the left (compared to the right) common iliac artery. High shear stresses appear at the aneurysm inlet and outlet as well as along the posterior wall, varying proportionally to the flow rate. At the same regions, elevated flow disturbances are observed, being intensified at flow peak and during the deceleration phase. Low shear stresses are present in the recirculation region, being two orders of magnitude smaller than the previous ones. At flow peak and during the deceleration phase, a clockwise swirling motion (viewed from the inlet) is present in the aneurysm due to the out of plane curvature of the aorta.	en
heal.publisher	SPRINGER	en
heal.journalName	EXPERIMENTS IN FLUIDS	en
dc.identifier.doi	10.1007/s00348-010-1034-6	en
dc.identifier.isi	ISI:000291042300018	en
dc.identifier.volume	50	en
dc.identifier.issue	6	en
dc.identifier.spage	1695	en
dc.identifier.epage	1709	en