대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)
- 대한기계학회 2000년도 추계학술대회논문집B
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- Pages.591-596
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- 2000
유연 혈관에서 유체-고체 상호작용에 대한 유한요소 해석
Finite element analysis of the fluid-structure interaction in a compliant vessel
- Shim, Eun-Bo ;
- Ko, Hyung-Jong ;
- Kamm, Roger D. (MIT)
- 발행 : 2000.11.02
초록
Flow through compliant tubes with linear taper in wall thickness is numerically simulated by finite element analysis. Two models are examined: a planar two-dimensional channel, and an axisymmetric tube. For verification of the numerical method, flow through a compliant stenotic vessel is simulated and compared to existing experimental data. Computational results for an axisymmetric tube show that as cross-sectional area falls with a reduction in downstream pressure, flow rate increases and reaches a maximum when the speed index (mean velocity divided by wave speed) is near unity at the point of minimum cross-section area, indicative of wave speed flow limitation or "choking" (flow speed equals wave speed) in previous one-dimensional studies. For further reductions in downstream pressure, flow rate decreases. Cross-sectional narrowing is significant but localized. When the ratio of downstream-to-upstream wall thickness is