EBC - ON DEMAND
European Bifurcation Club 2015 – EBC 2015 – Athens, Greece
Bifurcation PCI guidance: OCT, IVUS
Non-Newtonian CFD study in Bifurcations
Author: Patrick W. Serruys, MD, PhD, Erasmus Medical Center, Rotterdam (NL)
CONCLUSION
- In Newtonian fluids, viscosity doesn’t depend on gradients in flow speed.
- In Non-Newtonian fluids, viscosity changes when the gradient in flow speed changes
- Blood is a Non-Newtonian fluid and has shear-thinning behaviour
- The viscosity of blood depends on its velocityà
- velocity (shear rate) increases viscosity decreases
- Blood flow characteristics in arteries can be altered significantly by arterial disease, such as stenosis.
- In non-Newtonian models, variations can be seen in viscosity
- dynamic viscosity
- In bifurcations under Non-Newtonian model, the viscosity decrease in stenotic area and increases near recirculation area after stenotic region and when laminar flow resumes the viscosity increases at centerline.