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3D Bifurcating Artery (steady)
Created using ANSYS 2019R2
This tutorial has videos. If you are in a computer lab, make sure to have head phones.
Learning Goals
In this tutorial, you will learn to:
- Create a mesh for a three dimensional internal flow,
- Apply Non-Newtonian fluid properties using the Carreau model.
- Apply time-varying boundary conditions using User Defined Functions (UDF).
Problem Specification
Consider the following 3D model of a carotid artery bifurcation.
This model is created from a luminal casting of a carotid artery bifurcation and generously shared in Grabcad community
https://grabcad.com/library/carotid-bifurcation
Blood flows through the bifurcating artery from the inlet (to the left in the graph above) and exits from the two outlets (to the right). The diameter of the artery at the inlet is around 6.3mm. The diameter of outlet 1 is around 4.5mm and the diameter of outlet 2 is around 3.0mm. The density of blood is 1060 kg/m^3 [1]. As blood is a non-newtonian fluid, the coefficient of viscosity of blood is not a constant, but rather, it is a function of velocity gradients. Here we use the Carreau-model to model blood’s viscosity. Since blood flow is pulsatile and cyclic, the velocity profile at the inlet is a function of time. The pressure at the outlet is defined to be constant (100 mmHg). More details on boundary conditions will be provided in the next page Pre-Analysis and Set-up.
Summary of steps for ANSYS Workbench version 19.2 → 3D Bifurcating Artery Outline ANSYS 19.2.pdf