Numerical simulations of steady flow inside a three dimensional aortic bifurcation model

Area of Science:

• Computational fluid dynamics
• Biomedical engineering
• Cardiovascular science

Background:

• Atherosclerosis often occurs at aortic bifurcations.
• Understanding hemodynamics is crucial for explaining disease initiation.

Purpose of the Study:

• To develop a finite element model for simulating three-dimensional blood flow in a human aortic bifurcation.
• To analyze steady flow patterns and their relationship to atherosclerosis.

Main Methods:

• Finite element formulation of the Navier-Stokes equations for three-dimensional flow.
• Utilizing a cast of a human aortic bifurcation for model construction.
• Special attention to linear equation solver selection for numerical stability.

Main Results:

• Three-dimensional visualizations of velocity vectors, wall shear vectors, streamlines, and pressure isobars.
• Simulation of steady blood flow at a Reynolds number of 10.
• Identification of flow patterns within the bifurcation model.

Conclusions:

• The simulated flow patterns provide insights into the hemodynamic factors contributing to early atherosclerosis at the aortic bifurcation.
• Numerical analysis highlights the importance of computational methods in cardiovascular research.