... and migration, while a moderate expansion will lead to vortex elongation within the aneurysm bulb. These large vortices within the AAA cavity were associated with low velocities, which led to remodeling; the remodelled areas qualitatively correspond to areas of low 〈 | τ w...

... the resolved and modeled eddies, ensuring accurate treatment of near wall turbulence structures. Flow analysis was carried out in terms of vorticity and eddy viscosity magnitudes, velocity, and turbulence intensity profiles and the results were compared both with established experimental data...

... with duty cycle. A study of time-varying flow rate, velocity field, and vorticity illuminates the flow behavior during each phase of the cutting cycle and shows that the opening/closing transition plays a key role in improving the vitreous cutter’s efficacy and minimizing the potential damage to surrounding...

... volume methods fracture haemodynamics laminar flow turbulence vortices plaque stenosis carotid ulcerated hemorrhaged rupture hemodynamics computational fluid mechanics While the presence of severe stenosis can create intermittent and potentially transitional flow ( 14...

.... , and Yoganathan , A. , 2007 , “ Vorticity Dynamics of a Bileaflet Mechanical Heart Valve in an Axisymmetric Aorta ,” Phys. Fluids 1070-6631 , 19 ( 6 ), pp. 067105 – 067117 . 10.1063/1.2743261 Simon , H. , 2004 , Influence of the Implant Location on the Hinge and Leakage Flow Fields Through...

... simulation Green's function methods haemodynamics jets pulsatile flow turbulence vortices 16 10 2008 28 05 2009 16 10 2009 2009 American Society of Mechanical Engineers ...

... the formation of smaller secondary vortices in the dome (see the arrows in Fig. 7c ). Finally, near the end of the cardiac cycle (data not shown), flow diminishes and the large vortex at the center of the aneurysm redevelops. As seen in Figs. 8a 8b 8c , a jetlike blood stream enters the dome of Aneurysm B...

... accompanied by two weaker secondary internal vortices, one near the front and the other near the rear stagnation points (see Figs. 2c 2d ). The sense of rotation of the secondary vortices is opposite to that of the primary vortex, and the corresponding shear stresses will have opposite signs. Two distinct...

... to improve mechanical heart valve designs. 10 04 2007 02 10 2007 16 05 2008 cardiology cavitation computational fluid dynamics haemodynamics impact (mechanical) laser velocimetry shear flow vortices laser Doppler velocimetry mechanical heart valve blood damage shear...

... 2006 cardiovascular system haemodynamics vortices artificial organs DPIV vortex formation left ventricular flow mechanical heart valves Recent qualitative results support the conjecture that the healthy heart operates in an optimum energy-preserving manner...

... of vortical structures upstream of the aortic valve, vortex-induced velocities and redirection of the flow in abidance of the Biot–Savart law, domain segmentation, resonant times of vortical structures, and regions of stagnant flow. The presence of three distinct flow patterns, for the three configurations...

... measurement velocity measurement biomedical optical imaging nickel alloys titanium alloys prosthetics blood vessels diseases vortices elasticity The use of stents has dramatically increased since their approval by the United States Food and Drug Administration in 1994, largely as a result...

...) more vortices were present in the structured model than in the unstructured model; (3) both models had the least energy loss when flow was equally distributed to the left and right pulmonary arteries, while high losses occurred for extreme pulmonary arterial flow splits; (4) the energy loss results...

... that in inspiratory flow, and larger vortices existed in post-stenosis in expiratory flow, and thus might contribute to wheeze generation. For the rigid model during expiratory flow, Fig. 12 a shows the contour lines of dimensionless-averaged axial velocity and the distributions of dimensionless axial...

... received Feb. 2002; revised manuscript received Nov. 2002. Associate Editor: J. E. Moore, Jr. 01 Feb 2002 01 Nov 2002 09 04 2003 pulsatile flow finite element analysis physiological models haemodynamics laminar flow diseases vortices Abdominal Aortic Aneurysms (AAAs...

... phase of pulsatile flow, non-Newtonian behavior modeled by power-law The disturbed flow in the internal carotid, downstream of the stenosis throat, contains large recirculation regions and extremely high vorticity. The data predict that it is a transitional flow (Fig. 15 ). Both purely...

... of these lesions. Vortex Blood Flow SMC Proliferation Neointimal Morphogenesis blood blood vessels haemodynamics laminar flow vortices cellular biophysics 22 February 2000 17 September 2001 Contributed by the Bioengineering Division for publication in the JOURNAL...

... by the Bioengineering Division September 30, 1999; revised manuscript received May 15, 2001. Associate Editor: C. R. Ethier. 30 September 1999 15 May 2001 haemodynamics pulsatile flow physiological models vortices Abdominal Aortic Aneurysms (AAAs) are localized balloon-shaped expansions...

..., the flow downstream of the stenosis transitions to turbulence and exhibits all the classic features of post-stenotic flow as described by Khalifa and Giddens (1981) and Lieber and Giddens (1990). These include the periodic shedding of shear layer vortices and transition to turbulence downstream...

...H. Liu; T. Yamaguchi Blood flow in arteries often shows a rich variety of vortical flows, which are dominated by the complex geometry of blood vessels, the dynamic pulsation of blood flow, and the complicated boundary conditions. With a two-dimensional model of unsteady flow in a stenosed channel...