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Non-Newtonian CFD study in Bifurcations


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)



  • 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.


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