NUMERICAL STUDY ON THE STEADY FLOW CHARACTERISTICS OF PROXIMAL ANASTOMOTIC MODELS

摘要

Numerical simulations have been used to study the effects of grafting angle, graft Reynolds number and graft resistance on the steady flow characteristics of proximal anastomosis. Low velocity regions are found at the toe and heel, whose size depends on the graft Reynolds number, grafting angle and graft resistance. Stagnation point is found along the graft outer wall. The spatial gradients of wall shear stress are high around the anastomosis joint. Based on the simulation results, some methods are proposed to improve the graft patency rate. The simulation results are in reasonably good agreement with those of previous PIV measurements.