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Experiments in Fluids

, Volume 23, Issue 4, pp 288–298 | Cite as

Flowfields in lateral aneurysm models arising from parent vessels with different curvatures using PTV

  • T.-M. Liou
  • C.-C. Liao

Abstract

 Pulsatile and steady flowfields in a lateral aneurysm model arising from the parent vessel with radius of curvature to vessel diameter ratios of 2.5, 5, and ∞ are presented in terms of particle tracking velocimetry (PTV) measurements and flow visualization. The steady-flow case has a Reynolds number of 600 and the pulsatile-flow one has a Womersley number of 3.9 and Reynolds number of 600. It is found that there exist two opposite vortices and a single vortex in the aneurysms arising from a straight and a curved parent vessel, respectively. The intra-aneurysmal flow velocity, vorticity, and wall shear stresses increase with increasing curvature of the parent vessel. It is suggested from the present results that the lateral aneurysm arising from a straight or small-curvature parent vessel has a tendency to thrombosis whereas the lateral aneurysm arising from a large-curvature parent vessel is more risky.

Keywords

Vortex Reynolds Number Vorticity Flow Visualization Vessel Diameter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • T.-M. Liou
    • 1
  • C.-C. Liao
    • 1
  1. 1.Department of Power Mechanical Engineering National Tsing Hua University Hsinchu, Taiwan 30043, R.O.C.TW

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