Transport of blood particles: Chaotic advection even in a healthy scenario

We study the advection of blood particles in the carotid bifurcation, a site that is prone to plaque development. Previously, it has been shown that chaotic advection can take place in blood flows with diseases. Here, we show that even in a healthy scenario, chaotic advection can take place. To unde...

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Bibliographic Details
Published in:Chaos (Woodbury, N.Y.) N.Y.), 2020-09, Vol.30 (9), p.093135-093135
Main Authors: Silva, I. M., Schelin, A. B., Viana, R. L., Caldas, I. L.
Format: Article
Language:English
Subjects:
Advection
Bifurcations
Blood flow
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Summary:We study the advection of blood particles in the carotid bifurcation, a site that is prone to plaque development. Previously, it has been shown that chaotic advection can take place in blood flows with diseases. Here, we show that even in a healthy scenario, chaotic advection can take place. To understand how the particle dynamics is affected by the emergence and growth of a plaque, we study the carotid bifurcation in three cases: a healthy bifurcation, a bifurcation with a mild stenosis, and the another with a severe stenosis. The result is non-intuitive: there is less chaos for the mild stenosis case even when compared to the healthy, non-stenosed, bifurcation. This happens because the partial obstruction of the mild stenosis generates a symmetry in the flow that does not exist for the healthy condition. For the severe stenosis, there is more irregular motion and more particle trapping as expected.
ISSN:1054-1500
1089-7682
DOI:10.1063/5.0013460