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Biomedical Engineering

Blood flow phenomenon in arteries using coupled field analysis.

Principal Investigators:  Prof P A Kyriacou, Prof. R Pai B, Manipal University, India

Researcher:  Mr N Kumar

Funding:  City University London

Project Description

Until recently most of the research investigations have studied with rigid (CFD) and flexible wall (FSI) assumptions with Newtonian and non-Newtonian flow characteristics. The flexible arterial wall is assumed to exhibit both linear and nonlinear (hyper elastic) behaviour applied with Odgen and Mooney-Rivlin models. FSI interface is modelled with monolithic and partitioned loosely/strongly coupled two-way interactions. Several experimental studies are carried out on elastic and rigid specimens under steady and pulsatile flow conditions to measure flow patterns and critical shear stress regions. The aforementioned assumptions are considered in the recent studies based on idealistic and image-based patient specific geometries applied to normal and diseased conditions such as stenosis, aneurysm models and interaction with stents and grafts. Also, computer simulations of blood flow in arteries and veins can enhance information from imaging devices and help doctors make better-informed treatment decisions. Coupled field multiphysics based software tools are very useful and are widely used nowadays to carry out studies on arteries and analyze complex conditions. In the present study, commercially available FSI solver in ANSYS is used to simulate the blood flow by carrying out two-way sequentially coupled transient analysis between ANSYS CFX and ANSYS structure.