Compliance Mismatch Effects on a Pulsatile Flow in a Stented Artery

• Main Authors: Trabelsi, H, Ferchichi, M, Guellouz, M S
• Format: Conference Proceeding
• Language: English
• ISSN: 0094-243X
• DOI: 10.1063/1.2991039

This paper presents a numerical investigation of the flow interactions with a stented artery during a cardiac cycle. Both the artery and the stent were modeled as hyperelastic, isotropic and homogeneous material. The stent thickness was selected such that the area was reduced by 27.8% in the undisturbed artery/stent system. The spatial and temporal distributions of pressure, wall displacement and wall shear stress were evaluated for stent modulus of elasticity Es that varied from 1 to 100 times that of the main artery, Ea. The simulations suggested that increasing the elasticity ratio Es/Ea from 1 to 100 had only minor effects on the pressure axial variations, and the abrupt changes in the pressure and consequently the wall shear stress at the compliance transition zone were mainly due the stent geometry. Increasing the stent elasticity seemed to have a more pronounced affect on the wall displacement in that, the simulations suggested that drastic wall deformation occurred at the compliance transition zones when Es/Ea increased from 1 to 5 but increasing Es/Ea further did not result in further significant changes of the wall shape.