人工肝纤维管的螺旋形设计 与血液流动分析*

he helix tube fibers are designed in artificial liver system and the blood flow in the fibers is investigated with steady flow model and unsteady flow model, respectively. For the steady flow model, the greater curvature ratio of helix tube, the better for the mixing of blood; however, the wall shear stress becomes much higher. For the unsteady flow model, the value of pressure difference between inlet and outlet changes with the value of inlet velocity, and the wall shear stress is evolved with time in a cardiac cycle of pulsatile flow. And secondary flow is developed in cured pipe within the helix tube, which contributes to blood mixing and induces well-contacted between blood and tube wall. All of the above improvements provide better treatment efficiency of artificial liver.