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Modelling of inflow boundary conditions for image‐based simulation of cerebrovascular flow
Author(s) -
Oshima Marie,
Sakai Hiroyuki,
Torii Ryo
Publication year - 2005
Publication title -
international journal for numerical methods in fluids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 112
eISSN - 1097-0363
pISSN - 0271-2091
DOI - 10.1002/fld.834
Subject(s) - inflow , mechanics , boundary value problem , secondary flow , flow (mathematics) , curvature , vortex , shear stress , reynolds number , geology , mathematics , geometry , physics , mathematical analysis , turbulence
The goals of this study were to model the secondary flow components of inflow boundary conditions and examine the effects of inflow boundary conditions on cerebral haemodynamics. Finite element simulations were conducted for the curved pipe model and the results were compared with PIV measurements. The vortex structures of secondary flow were modelled in terms of the Dean number, which is a function of curvature and the Reynolds number. The modelled secondary flow was superimposed on the axial velocity profile obtained by ultrasound as the inflow boundary condition. The image‐based simulation was performed for an aneurysm of the middle cerebral artery using the modelled inflow boundary conditions. Results of inflow models with and without secondary flow are compared and show differences in flow patterns and wall shear stress distributions depending on the inflow model. Copyright © 2005 John Wiley & Sons, Ltd.