Abstract
An aneurysm is blood disease that is caused by blowing up of the artery wall.There is high probability of death if it is ruptured.Bypass surgery may be used when it is difficult to treat aneurysms by conventional treatment,for example when the aneurysm is located near ophthalmic artery that should keep the blood flow.There is not so much investigation about the bypass surgery from the point of the flow characteristics.Therefore,the purpose of this study is to investigate the flow-field within the aneurysm by visualization experiments and numerical analyses.As result of experiments it was observed that the flow rate through the branch was changed by the bypass flow and difference of the branch diameter.On the other hand,different flow pattern was also obtained at bifurcation area from numerical analyses that were performed by two-dimensional incompressible Navier-Stokes simulation.
