... remodeling. 02 05 2011 17 11 2011 23 12 2011 23 12 2011 biomechanics cardiology diseases elongation haemodynamics numerical analysis physiological models vortices An abdominal aortic aneurysm (AAA) is a dilation of at least 1.5 times the diameter of the largest...

... 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...

... illuminate mechanisms of hemorrhage and other vessel remodeling. 04 12 2009 02 08 2010 16 08 2010 27 09 2010 27 09 2010 blood vessels computational fluid dynamics finite volume methods fracture haemodynamics laminar flow turbulence vortices plaque stenosis...

.... Downstream convection would then re-orient these vortices in a streamwise direction such that they would induce mixing between the jet and the ambient fluid ( 33 ). It is thus surprising to note in Fig. 11 that, after the effect of jet oscillation is removed, the spreading rates for the control and VG...

... turbulence vortices anastomosis implicit large eddy simulation left ventricular assist device hemolysis wall shear stress Left ventricular assist devices (LVADs) have been a viable option to assist or replace the function of a failing left heart in adult patients with end-stage congenital...

... measurement computational fluid dynamics diagnostic radiography fracture pulsatile flow shear flow vortices X-ray applications computational fluid dynamics intracranial aneurysm cerebral aneurysm heart rate Womersley number flow disturbance large eddy simulation An IA...

... biomembranes blood vessels cellular biophysics haemodynamics haemorheology non-Newtonian flow vortices Arterial gas embolism (bubble) occurs from many causes including decompression sickness and medical procedures such as cardiopulmonary bypass surgery and angiography ( 1 ). Intravascular air...

... the housing. Due to the complex nature of the whole flow field illustrated in Fig. 3 , we concentrate here on regions of high acceleration and deceleration, regurgitation, and vorticity. Typically, these regions produce large pressure differentials and high shear. Three dimensional flow structures...

... this maximum is reached, the vortex ring pinches off causing any surplus of generated vorticity to shed into its wake forming a trailing jet. Gharib et al. provided a theoretical proof of the existence of the FN based on the Kelvin-Benjamin variational principle...

... 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. To simulate the motion of the trachea smooth muscle and cartilage rings, we considered a fluid-filled flexible tube. The tube, which is infinitely long, thin wall, isotropic...

... the appearance of secondary flows in late diastole. 1 Systolic acceleration involves downstream ejection of the residual vortices left from the previous cycle, yielding an attached flow pattern. 2 Systolic deceleration is characterized by flow separation at the proximal end, toroid-shaped single...

... blood vessels haemodynamics pulsatile flow numerical analysis turbulence vortices Carotid Artery Bifurcation Stenotic Vessels Atherosclerosis Plaque Rupture Finite Volume Flow through severely atherosclerotic vessels is of great interest. These vessels pose grave health risks...

... received September 17, 2001. Associate Editor: V. T. Turitto. 22 February 2000 17 September 2001 blood blood vessels haemodynamics laminar flow vortices cellular biophysics Vortex Blood Flow SMC Proliferation Neointimal Morphogenesis Focal neointima and atheroma...

... received 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...

..., 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...