The Need of Slanted Side Holes for Venous Cannulae
Figure 3
2D simulation results. (a) 2D computational geometry was constructed using the same dimensions from 3D model. However, to show clearly the effect of PD, different boundary conditions was applied; same pressure boundary were applied to the cannula inlet, and mass flow boundary was applied to the inlets from the blood vessel. (b) Therefore, the flow through the main inlet of cannula tip is dependent on PD value. By changing the angle to 45°, more amount of flow can be transferred to the main stream while the same flow rate is supplied through the side holes because of the application of mass flow inlet condition at the vessel part. Note that “I, II, and III” are the corresponding notations used in Figure 1(c).
