지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2014.10
- 수록면
- 223 - 228 (6page)
이용수
초록· 키워드
오류제보하기
Turbulent blood flow may be generated by complicated vessel geometries at certain flow rate. Blood flows with stenosis may cause turbulence when the shape of stenosis is asymmetric. In such a case, vessels may be damaged by the turbulent flow because velocity gradient of turbulent flow is large near the wall. Therefore, it is very important to predict turbulence accurately when the blood flow in the vessel is simulated. Varghese et al[1] solved a eccentric stenosis flow(70% area reduction) as a simple model of the blood flow with stenosis in a complicated vessel geometry. Direct Numerical Simulation was conducted using spectral element method and a grid independent solution was obtained using a fine grid. The simulation results showed that laminar flow occurs at the inlet region whereas turbulence flow occurs after stenosis region. In the present study, since finite element method(FEM) is able to solve a vessel flow easily with unstructured meshes, large eddy simulations based on FEM are conducted to solve turbulent flows in a vessel. A fractional three-step P2P1 finite element formulation are adopted for solving the unsteady incompressible Navier-Stokes equation. The present results agree well with the grid independent solution of Varghese et al[1] with respect to mean velocity profile.
목차
Abstract
1. Introduction
2. Numerical Method
3. Results and Discussion
4. Conclusion
5. References
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