Related Experiment Videos
A mathematical model for blood flow through an arterial bifurcation
P N Tandon1, M Kawahara, U V Rana
1Department of Mathematics, Universiti Brunei Darussalam, Gadong.
International Journal of Bio-Medical Computing
|May 1, 1994
Summary
This study models blood flow in arterial bifurcations using a thixotropic power-law fluid model. It reveals how stenosis and Reynolds number affect shear stress, with blood thixotropy mitigating high stress and flow reversal.
Area of Science:
- Biomedical Engineering
- Fluid Dynamics
- Computational Mechanics
Background:
- Arterial bifurcations are critical sites for hemodynamic alterations.
- Blood rheology, particularly thixotropy, significantly influences flow dynamics.
- Pathological conditions like stenosis alter normal blood flow patterns.
Purpose of the Study:
- To analyze blood flow through arterial bifurcations using a modified thixotropic power-law fluid model.
- To investigate the impact of varying Reynolds numbers and flow behavior indices on flow characteristics.
- To elucidate pressure, velocity, and wall shear stress distributions in normal and diseased arterial states.
Main Methods:
- Finite element technique for numerical simulation.
- Modified thixotropic power-law fluid model for blood rheology.
- Parametric analysis for normal and pathological blood states.
Main Results:
- Identified low shear stress zones behind stenosis and high shear stresses downstream of the apex.
- Demonstrated that increased stenosis percentage and Reynolds number enhance high shear stress zones.
- Observed that blood thixotropy reduces high shear stresses and flow reversal regions.
Conclusions:
- The thixotropic power-law model effectively simulates blood flow in bifurcations.
- Hemodynamic parameters like shear stress are significantly influenced by stenosis and flow conditions.
- Blood's inherent thixotropic properties play a protective role against adverse flow phenomena.