Flow dynamic effect of the anastomotic angle: a numerical study of pulsatile flow in vascular graft anastomoses models.

摘要: Pulsatile non-Newtonian blood flow in three distal end-to-side anastomoses models of prosthetic grafts has been analysed applying computer simulation. The anastomotic angles the three-dimensional geometric vary over 30°, 45° and 60°. pulsatile inflow conditions graft remain unchanged. Numerical results are presented for axial secondary velocity wall shear stress distribution. Further, paths fluid particles particle residence times demonstrated by means numerical visualization. quantitative study shows complex patterns with separation strong motion host vessel a weakly migrating stagnation point on arterial floor during entire pulse cycle under consideration. dynamic effects, which seem to be important development intimal hyperplasia, dependent angle increase increasing angle.