A numerical simulation of a bypass conduit with steady and pulsatile flow

Leok Poh Chua, Junmei Zhang, Simon Ching Man Yu, Tongming Zhou

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Intimal hyperplasia (IH) has been cited as a major cause of vascular graft failure, which is associated with the hemodynamic conditions [1, 2]. Most of the earlier studies were concentrated at the distal anastomosis, therefore in this study computational methods were used to describe the blood motion in the proximal anastomosis models. Both steady and pulsatile flow conditions have been investigated. For steady flow cases, low velocity regions were found to appear on both the heels and the toes of the junction. The spatial extent of these low velocity regions was dependent on the graft Reynolds number as well as on the grafting angle and the flow rate ratio of the graft and aorta. For the pulsatile flow, a low velocity recirculating region was formed during the peak flow phase and the flow was reverted from the graft back to the aorta during the deceleration phase of the cycle. Wall shear stress distributions for various cases were also computed. A reasonable good agreement was found between the present results and the previous PIV measurements.

Original languageEnglish
Title of host publicationProceedings of the 4th ASME/JSME Joint Fluids Engineering Conference
Subtitle of host publicationVolume 1, Part C, Forums
EditorsA. Ogut, Y. Tsuji, M. Kawahashi
PublisherAmerican Society of Mechanical Engineers
Pages2089-2094
Number of pages6
ISBN (Print)0791836967, 9780791836965
DOIs
Publication statusPublished - 2003
Externally publishedYes
Event4th ASME/JSME Joint Fluids Engineering Conference - Honolulu, HI, United States
Duration: 6 Jul 200310 Jul 2003

Publication series

NameProceedings of the ASME/JSME Joint Fluids Engineering Conference
Volume1 C

Conference

Conference4th ASME/JSME Joint Fluids Engineering Conference
Country/TerritoryUnited States
CityHonolulu, HI
Period6/07/0310/07/03

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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