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Tenth International Symposium on Turbulence and Shear Flow Phenomena
July, 7-9, 2017 , Swissotel Chicago, Chicago, Illinois, U.S.A.

DOI: 10.1615/TSFP10

INSIGHTS ON ARTERIAL SECONDARY FLOW STRUCTURES AND VORTEX DYNAMICS GAINED USING THE MRV TECHNIQUE

pages 229-234
DOI: 10.1615/TSFP10.400
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要約

The purpose of this study is to gain an understanding of the formation of arterial secondary flow structures due to physiological parameters such as geometry (curvature), pulsatility and harmonics of inflow conditions. Accordingly, in vitro experimental investigation of arterial secondary flow structures was performed using the magnetic resonance velocimetry (MRV) technique at Stanford University. In this paper, we discuss the kinematics of vorticity in two regions of a 180° curved artery model viz., the entrance- (or straight-inlet pipe) and the 180° curved pipe-region. We applied the Womersley solution in the entrance-region to ascertain the unsteady pressure drop per unit length and inplane vorticity for a pulsatile, carotid artery-based flow rate waveform. In the 180° curved pipe region a simple circulation budget was performed to discern vortex-splitting of large-scale Dean-type vortices.

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