Abo Bibliothek: Guest
Second Symposium on Turbulence and Shear Flow Phenomena
June, 27-29, 2001, KTH, Stockholm, Sweden

DOI: 10.1615/TSFP2

SHEAR-INSTABILITY IN POSTSTENOTIC ARTERIAL FLOWS

pages 67-72
DOI: 10.1615/TSFP2.110
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ABSTRAKT

The paper is concerned with instabilities and transition-to-turbulence in pulsatile flows through a stenosis. Our long term objective is to obtain a better understanding of the flow phenomena associated with diseases such as atherosclerosis and stroke. This can potentially help the development of better diagnostic criteria and clinical detection techniques. Using high-order Godunov-type methods and advanced non-linear multigrid algorithms we have performed three-dimensional simulations of the pulsatile flow through a 75% stenosis and investigate the details of the flow development with particular interest in the poststenotic region. Our simulations reveal the formation of a three-dimensional instability which leads to a strongly disturbed flow extended up to 50-60 radius downstream of the stenosis. This flow behaviour subsequently affects the wall shear stress distribution.

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