Abstract
High resolution 3D simulation (involving 100M degrees of freedom) were
employed to study transient turbulent flow in a carotid arterial
bifurcation with a stenosed internal carotid artery (ICA). In the
performed simulation an intermittent (in space and time)
laminar-turbulent-laminar regime was observed. The simulation reveals
the mechanism of the onset of turbulent flow in the stenosed ICA where
the narrowing in the artery generates a strong jet flow. Time- and
space-window Proper Orthogonal Decomposition (POD) was applied to
quantify the different flow regimes in the occluded artery. A simplified
version of the POD analysis that utilizes 2D slices only - more
appropriate in the clinical setting - was also investigated.
| Original language | English GB |
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| Title of host publication | American Physical Society, 62nd Annual Meeting of the APS Division of Fluid Dynamics, November 22-24, 2009 |
| State | Published - 1 Nov 2009 |