Effect of swirling blood flow on vortex formation at post-stenosis
SCIE
SCOPUS
- Title
- Effect of swirling blood flow on vortex formation at post-stenosis
- Authors
- Ha, H; Choi, W; Park, H; Lee, SJ
- Date Issued
- 2015-02
- Publisher
- SAGE PUBLICATIONS LTD
- Abstract
- Various clinical observations reported that swirling blood flow is a normal physiological flow pattern in various vasculatures. The swirling flow has beneficial effects on blood circulation through the blood vessels. It enhances oxygen transfer and reduces low-density lipoprotein concentration in the blood vessel by enhancing cross-plane mixing of the blood. However, the fluid-dynamic roles of the swirling flow are not yet fully understood. In this study, inhibition of material deposition at the post-stenosis region by the swirling flow was observed. To reveal the underlying fluid-dynamic characteristics, pathline flow visualization and time-resolved particle image velocimetry measurements were conducted. Results showed that the swirling inlet flow increased the development of vortices at near wall region of the post-stenosis, which can suppress further development of stenosis by enhancing transport and mixing of the blood flow. The fluid-dynamic characteristics obtained in this study would be useful for improving hemodynamic characteristics of vascular grafts and stents in which the stenosis frequently occurred. Moreover, the time-resolved particle image velocimetry measurement technique and vortex identification method employed in this study would be useful for investigating the fluid-dynamic effects of the swirling flow on various vascular environments.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/35095
- DOI
- 10.1177/0954411915573065
- ISSN
- 0954-4119
- Article Type
- Article
- Citation
- PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART H-JOURNAL OF ENGINEERING IN MEDICINE, vol. 229, no. 2, page. 175 - 183, 2015-02
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