Flow Through S‐shaped Glass Models Simulating Arterial Tortuosities

Abstract

SUMMARYFlow patterns in twenty-one glass models of S bends were examined using the dye-injection technique. The glass models were of different configurations designed to simulate arterial tortuosities. In each model flow disturbances were observed in the stem distal to the S bend or in the distal portion of the S bend itself at Reynolds numbers below 2000. The disturbances were periodic in nature and mostly regular, but with considerable sensitivity to external disturbances. The sharpness of the flexures appeared to be important in determining the Reynolds number at which flow disturbances occurred. The significance of the flow disturbances is their seeming applicability to the human vascular system.

In silico design of additively manufacturable composite synthetic vascular conduits and grafts with tuneable compliance

“…9 Glass models have been used for optical flow visualisation and particle image velocimetry measurements (PIV). 10,11 With advances in rapid prototyping technology, rigid anatomical models can be fabricated using Polyjet 3D printing in combination with transparent resins such as VeroClear (Stratasys, Eden Prairie, MN). 12 Compliant models made from silicone and latex materials are often used in the mechanical characterisation and durability testing of endovascular devices such as stents.…”