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Pulsatile spiral blood flow through arterial stenosis
Fabian Linge1, Md Abdul Hye, Manosh C Paul
1a CFD Group, System, Power & Energy Research Division, School of Engineering, University of Glasgow , Glasgow G12 8QQ , UK.
Computer Methods in Biomechanics and Biomedical Engineering
|March 13, 2013
Summary
This study shows that spiral blood flow in arterial stenosis increases static pressure during flow deceleration. It also reduces turbulence and wall shear stress post-stenosis, aiding in understanding blood flow dynamics.
Area of Science:
- Fluid Dynamics
- Biomedical Engineering
- Computational Science
Background:
- Arterial stenosis, a common cardiovascular condition, involves narrowed blood vessels.
- Understanding blood flow dynamics in stenotic arteries is crucial for diagnosing and treating cardiovascular diseases.
- Pulsatile flow and complex flow patterns, like spiral components, can significantly impact hemodynamics.
Purpose of the Study:
- To investigate the effects of pulsatile spiral blood flow in a model of arterial stenosis.
- To analyze the influence of a spiral flow component on pressure, turbulence, and wall shear stress.
- To explore the pathological implications of these flow dynamics in stenotic arteries.
Main Methods:
- Numerical fluid dynamics simulations were employed.
- A two-equation k-ω model was used to simulate transitional flow.
- Simulations were conducted for Reynolds numbers of 500 and 1000 in a 3D arterial stenosis model with 75% area reduction.
Main Results:
- The spiral flow component was found to increase static pressure in the vessel during the deceleration phase of the flow pulse.
- The spiral component was observed to reduce turbulence intensity in the post-stenosis region.
- Reduced wall shear stress in the early stages of the flow pulse was also attributed to the spiral component.
Conclusions:
- Spiral blood flow has a significant impact on hemodynamic parameters within arterial stenosis.
- Findings suggest that spiral flow may mitigate some adverse effects of stenosis, such as high turbulence and shear stress.
- The study provides insights into the complex relationship between blood flow patterns and arterial pathology.
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