Sensitivity of hemodynamic parameters to waveform, flow division, and head rotation in the human carotid bifurcation
Date Issued
2009
Author(s)
Abstract
Hemodynamic parameters such as time averaged wall shear stress
(TAWSS), wall shear stress temporal gradient (WSSTG) and
Oscillatory Shear Index (OSI) have previously been cited as
parameters associated with the development of atherosclerotic disease
at the human carotid bifurcation [1,2]. The sensitivity of these
important parameters however, with variations of driving flow
waveform, flow division and posture changes are not well known. To
investigate these changes, we have used image based CFD, to analyze
the flowfield of the carotid bifurcation of a healthy volunteer for five
different input waveforms, three flow division ratios and two head
postures.
(TAWSS), wall shear stress temporal gradient (WSSTG) and
Oscillatory Shear Index (OSI) have previously been cited as
parameters associated with the development of atherosclerotic disease
at the human carotid bifurcation [1,2]. The sensitivity of these
important parameters however, with variations of driving flow
waveform, flow division and posture changes are not well known. To
investigate these changes, we have used image based CFD, to analyze
the flowfield of the carotid bifurcation of a healthy volunteer for five
different input waveforms, three flow division ratios and two head
postures.
Subjects