Influence of the pulse shape on the flow field in a three dimensional model of the human carotid artery bifurcation (LDA experiments)

摘要: Unsteady flow measurements were performed in a stenosed and non-stenosed 25:l enlarged three diimensi0n-d model of ?he hman mrotid e r y bifurcation at Reynolds numbers Remb=iuuu Re,,k=270 with division ratio 35% Womersley parameter 1~~7.24. Both axial secondary velocities measured by means Laser Doppler Anemometry P A ) . ihe influence the pulse shape was examined decreasing systolic deceleration respect to used experiments Gijsen et al. (1993). Comparing results nonstenosed those (1993) yields that are complete accordance what we would expect from fuidmgs Palmen (1992): velocity distribution decreased displays smaller region reverse containing more negative velocities, pronounced shear layer an increased vortex formation. JLxpehents show main differences field can be found area high as confirmed As conclusion this paper it said whereas effect cames much weight, infiuence stenosis on is rather subtle. This should certainly taken into account diagnosis cardiovascular lesions based detection disturbances.