협착된 경동맥내 천이 유동 수치 해석Numerical Analysis of Transitional Flow in a Stenosed Carotid Artery
- Other Titles
- Numerical Analysis of Transitional Flow in a Stenosed Carotid Artery
- Authors
- 김동민; 황진율; 민두재; 조원민
- Issue Date
- 2022
- Publisher
- 한국가시화정보학회
- Keywords
- transitional flow; stenosis; wall shear stress; carotid artery; numerical analysis; 천이 유동; 협착; 벽면전단응력; 경동맥; 수치해석
- Citation
- 한국가시화정보학회지, v.20, no.1, pp.52 - 63
- Indexed
- KCI
- Journal Title
- 한국가시화정보학회지
- Volume
- 20
- Number
- 1
- Start Page
- 52
- End Page
- 63
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/142046
- ISSN
- 1598-8430
- Abstract
- Direct numerical simulation of blood flow in a stenosed, patient-specific carotid artery was conducted to explore the transient behavior of blood flow with special emphasis on the wall-shear stress distribution over the transition region. We assumed the blood as an incompressible Newtonian fluid, and the vessel was treated as a solid wall. The pulsatile boundary condition was applied at the inlet of the carotid. The Reynolds number is 884 based on the inlet diameter, and the maximum flow rate and the corresponding Womersley number is approximately 5.9. We found the transitional behavior during the acceleration and deceleration phases. In order to quantitatively examine the wall-shear stress distribution over the transition region, the probability density function of the wall-shear stress was computed. It showed that the negative wall-shear stress events frequently occur near peak systole. In addition, the oscillatory shear stress index was used to further analyze the relationship with the negative wall-shear stress appearing in the systolic phase.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Medicine > Department of Medical Science > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.