Abstract
As an investigation into the mechanical factors which contribute to aneurysm growth and rupture, flow field measurements for steady flow are presented for a range of Reynolds numbers. Steady flow through rigid aneurysm models with roughly elliptical geometry is studied. Data is reported for a model of length 4d and diameter 2.5d, where d is the inner diameter of the entrance tube. Flow rates were chosen such that model Reynolds numbers matched in vivo Reynolds numbers for a range of subject activity level from resting to highly active. Laser-Doppler velocimetry (LDV) was used to verify flow patterns visualized with CDFI, and to quantify the flow velocities during laminar, transition and turbulent flow regimes. A well defined core flow was observed for all Reynolds numbers studied. The observed flow as laminar at Re=450 and Re=1300, and a stable recirculation zone occurred outside the core flow. Turbulent flow was observed at Re=2800 and no recirculation was seen in this case. This investigation represents an initial step in a more extensive study of flow fields within abdominal aortic aneurysms, the results of which will have significant implications for clinical decisions concerning the treatment of aortic aneurysms. >
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
