Numerical Study of Turbulent Pulsatile Blood Flow through Stenosed Artery Using Fluid-Solid Interaction

الملخص EN

The turbulent pulsatile blood flow through stenosed arteries considering the elastic property of the wall is investigated numerically.

During the numerical model validation both standard k-ε model and RNG K-ε model are used.

Compared with the RNG K-ε model, the standard K-ε model shows better agreement with previous experimental results and is better able to show the reverse flow region.

Also, compared with experimental data, the results show that, up to 70% stenosis, the flow is laminar and for 80% stenosis the flow becomes turbulent.

Assuming laminar or turbulent flow and also rigid or elastic walls, the results are compared with each other.

The investigation of time-averaged shear stress and the oscillatory shear index for 80% stenosis show that assuming laminar flow will cause more error than assuming a rigid wall.

The results also show that, in turbulent flow compared with laminar flow, the importance of assuming a flexible artery wall is more than assuming a rigid artery wall.