Third M.I.T. Conference on Computational Fluid and Solid Mechanics June 14–17, 2005  

RANS computations of artery flows

G. Medic*
Stanford University, Mechanical Engineering Department, Stanford, CA 94305, USA

  Full Text
Pulsatile blood flow in stenotic vessels is investigated using a Reynolds-averaged Navier-Stokes framework. Two simplified models for arterial stenoses were analyzed: a two-dimensional channel with a one-sided semicircular constriction and a smooth axisymmetric stenosis. Although these flows are at a relatively low Reynolds number, the constriction induces separation that causes the flow to transition to turbulence for most large arteries. The prediction of such flows represents a challenge for RANS turbulence models and warrants a closer look at their low-Re modifications.

Keywords:  RANS; Turbulence modeling; Low Reynolds; Artery flows; Atherosclerosis

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