期刊
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
卷 17, 期 11, 页码 1248-1260出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10255842.2012.744396
关键词
carotid bifurcation; CFD; FSI; impedance method; blood flow; wall shear stress
资金
- Spanish Ministry of Science and Technology [DPI 2010-20746-C03-01]
- CIBER-BBN
- VI National RDI Plan
- Iniciativa Ingenio
- Consolider Program
- CIBER Actions
- Instituto de Salud Carlos III
In this study, we develop structured tree outflow boundary conditions for modelling the human carotid haemodynamics. The model geometry was reconstructed through computerised tomography scan. Unsteady-state computational fluid dynamic analyses were performed under different conditions using a commercial software package ADINA R&D, Inc., (Watertown, MA, USA) in order to assess the impact of the boundary conditions on the flow variables. In particular, the results showed that the peripheral vessels massively impact the pressure while the flow is relatively unaffected. As an example of application of these outflow conditions, an unsteady fluid-structure interaction (FSI) simulation was carried out and the dependence of the wall shear stress (WSS) on the arterial wall compliance in the carotid bifurcation was studied. In particular, a comparison between FSI and rigid-wall models was conducted. Results showed that the WSS distributions were substantially affected by the diameter variation of the arterial wall. In particular, even similar WSS distributions were found for both cases, and differences in the computed WSS values were also found.
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