... and viscosity remain more or less constant, the local vessel diameter largely determines the Womersley number [ 18 ]. Maximum values are found in the aorta, in the range of 16–20 for healthy subjects at rest [ 6 , 19 ]. Another dimensionless number important to characterize pulsatile flows is the Womersley...

...; a single bifurcation tube; and a simple arterial network with four bifurcations. Soft polyurethane tubes were used and the configuration was based on a realistic human arterial network. The tensile modulus of the material was similar to the elasticity of arteries. A pulsatile flow with ejection time 0.3 s...

... 06 2011 29 08 2011 31 10 2011 31 10 2011 biomedical equipment blood flow measurement cardiology flow visualisation friction kinematics pulsatile flow shear flow viscosity ventricular assist device thrombosis fluid dynamics pulsatile wall shear particle image...

... 2011 11 10 2011 11 10 2011 biochemistry biological fluid dynamics bioreactors bone cellular biophysics foams macromolecules molecular biophysics orthopaedics porous materials proteins pulsatile flow tissue engineering mesenchymal stem cells PLGA pulsatile perfusion...

... swelling effects in the rat left ventricle [( 56 )] and in aorta [( 57 )]. 14 12 2010 13 05 2011 17 05 2011 05 07 2011 05 07 2011 biomechanics blood vessels haemodynamics physiological models pulsatile flow Arteries function as conduits responsible...

... the actual valve model. Dynamic shear stresses were then obtained by applying the techniques on the valve model in a physiologic pulsatile flow loop. Results show that aortic surface shear stresses are low during early systole (<5dyn/cm 2 ) but elevated to its peak during mid to late systole at about 18...

... the best overall agreement. The present study demonstrated the power of LES methods, although they were computationally more costly, and added further evidence of the promise of the RANS transition model used here, previously tested in pulsatile flow on a similar model. Both dynamic Smagorinsky LES...

... 08 2010 17 09 2010 04 10 2010 27 10 2010 27 10 2010 haemodynamics haemorheology medical computing numerical analysis aneurysm hemodynamics vortex formation computational fluid dynamics pulsatile flow Intracranial aneurysm is a life-threatening disease...

...Iman Borazjani; Fotis Sotiropoulos We carry out three-dimensional high-resolution numerical simulations of a bileaflet mechanical heart valve under physiologic pulsatile flow conditions implanted at different orientations in an anatomic aorta obtained from magnetic resonance imaging (MRI...

... biological tissues cardiovascular system diseases finite element analysis flow simulation haemodynamics permeability physiological models pulsatile flow aneurysm porohyperelastic permeability finite element model Abdominal aortic aneurysms (AAAs) are a progressive dilatation...

... static pressure loading and pulsatile flow. The stent shows good dynamic behavior in keeping position imposed at implantation time and in matching the aortic root dimensions changes. Prosthesis static and dynamic regurgitation are evaluated and show values close to those obtained with other commercially...

... ) maximum shear stress 13 04 2009 20 10 2009 22 12 2009 17 02 2010 17 02 2010 blood vessels finite volume methods flow simulation fluid oscillations haemodynamics jets paediatrics prosthetics pulsatile flow shear turbulence An anastomosis is a surgical...

... , D. P. , Zarins , C. K. , and Glagov , S. , 1985 , “ Pulsatile Flow and Atherosclerosis in the Human Carotid Bifurcation—Positive Correlation Between Plaque Location and Low and Oscillating Shear-Stress ,” Arterioscler. Thromb., Vasc., Biol. , 5 ( 3 ), pp. 293 – 302 . Cho , Y...

... for both anastomotic configurations, although its long-term effect on the flow splitting remains unknown. A large increase in wall shear stress is found near the cannulation sites during the LVAD support. This work builds a foundation for more physiologically realistic simulations under pulsatile flow...

... of variance (ANOVA). biomechanics biomedical optical imaging blood vessels elasticity haemodynamics optical microscopy proteins pulsatile flow pulsatile pressure internal elastic lamina collagen fibronectin connexin 43 porcine artery ex vivo organ culture Arteries...

... 11 2008 11 05 2009 01 09 2009 blood pressure measurement blood vessels cellular biophysics mathematical analysis molecular biophysics muscle proteins pulsatile flow shear flow hypertension vascular remodeling mass fractions collagen The strains in the arterial...

...Carolyn Fisher; Jenn Stroud Rossmann Blood flow dynamics near and within cerebral aneurysms have long been implicated in aneurysm growth and rupture. In this study, the governing equations for pulsatile flow are solved in their finite volume formulation to simulate blood flow in a range of three...

... the characteristics of pulsatile flow in and around two “patient-specific” intracranial aneurysms at three different cardiac frequencies. Three dimensional X-ray angiographic data (3D-DSA) were used to reconstruct accurate and patient-specific aneurysm geometries. Then, computational fluid dynamics techniques were...

... Summer Bioengineering Conference , pp. 497 – 498 . Kobayashi , S. , Fukuzawa , Y. , Ayama , Y. , Morikawa , H. , Tang , D. , and Ku , D. N. , 2005 , “ Pulsatile Flow and Deformation in Curved Stenosis Models of Arterial Disease—Influence of Cyclic Change of Curvature...

... fluid dynamics simulations under pulsatile flow conditions. A flat rectangular stented vessel model was constructed and simulations were carried out using rigid walls and sinusoidal velocity input (nominal wall shear stress of 10 ± 5 dyn / cm 2 ). Mesh independence was determined from convergence...