Author: Rajesh Bhaskaran & Sebastien Lachance-Barrett, Cornell University

Problem Specification

1. Pre-Analysis & Start-Up

2. Geometry

3. Mesh

4. Physics Setup

5. Numerical Solution

6. Numerical Results

7. Verification & Validation

Exercises

Comments

# 2D Bifurcating Artery

Created using ANSYS 14.5

## Problem Statement

You will simulate blood flow in an idealized bifurcated blood vessel using ANSYS FLUENT®, a commercially available CFD software package. You will study:

- The effect of fatty plaque on the blood flow
- The effect of a blood clot in addition to the fatty plaque

You will be calculating the velocity, wall shear stress and pressure gradient for the cases outlined below.

**Geometry**

We’ll ignore 3D effects and use the following idealized 2D geometry. All dimensions are shown in mm.

Consider the following two plaque configurations. Model the plaque as a circular arc with a diameter of 3 mm except the one that spans two limbs whose dimensions are shown below.

You also need to study the effect of a blood clot in the right branch (in addition to the plaque) as shown in the figure below. Assume that the blood clot has a diameter of 1 mm.

**FLUENT Inputs**

- Steady 2D flow
- Outlet gauge pressure = 0 Pa
- Density = 1000 kg/m
^{3} - Coefficient of viscosity = 0.001 kg/(m-s)
- Adjust inlet velocity to get a Reynolds no. of 400.

**Cases to be studied**

- No plaque
- The above two plaque configurations without blood clot
- The above two plaque configurations with blood clot
Consider two combinations of

and

.