Experimental and computational analysis on the pulsatile flow behavior in Abdominal Aortic Aneurysm models

S. C.M. Yu, W. K. Chan, B. T.H. Ng, L. P. Chua

Research output: Chapter in book / Conference proceedingChapter in an edited book (as author)Academic researchpeer-review

Abstract

Pulsatile flow behavior in rigid Abdominal Aortic Aneurysm models had been investigated both experimentally (using Particle Image Velocimetry) and computationally (using Fluent v.4.3) over a range of Reynolds number (from 400 to 1,400) and Womersley number (from 17 to 22). A sinusodial inlet flow waveform 1 + sinωt with thin inlet boundary layers had been used to produce the required pulsatile flow conditions. The experiments focused on the bulk features of the flow while CFD was used to examine some detailed features such as wall shear stresses and static pressure distribution. Recirculating vortices appeared at different phases of a flow cycle causing significant spatial and temporal variations in wall shear stresses and static pressure distributions. High level of shear stresses usually appeared at the upstream and downstream ends of the bulge. Further simulation studies were conducted using simulated physiological waveforms under the resting and exercise conditions so as to determine the possible effects of vortex dynamics inside the AAA models.

Original languageEnglish
Title of host publicationProceedings of the 1999 3rd ASME/JSME Joint Fluids Engineering Conference, FEDSM'99, San Francisco, California, USA, 18-23 July 1999 (CD-ROM)
PublisherAmerican Society of Mechanical Engineers
Pages1
Number of pages1
ISBN (Print)0791819612
Publication statusPublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Engineering(all)
  • Environmental Science(all)

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