Numerical study on the energy cascade of pulsatile Newtonian and power-law flow models in an ICA bifurcation.

ABSTRACT: The complex physics and biology underlying intracranial hemodynamics are yet to be fully revealed. A fully resolved direct numerical simulation (DNS) study has been performed to identify the intrinsic flow dynamics in an idealized carotid bifurcation model. To shed the light on the significance of considering blood shear-thinning properties, the power-law model is compared to the commonly used Newtonian viscosity hypothesis. We scrutinize the kinetic energy cascade (KEC) rates in the Fourier domain and the vortex structure of both fluid models and examine the impact of the power-law viscosity model. The flow intrinsically contains coherent structures which has frequencies corresponding to the boundary frequency, which could be associated with the regulation of endothelial cells. From the p

SUBMITTER: Mahrous SA 

PROVIDER: S-EPMC7833255 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature