腹主动脉血管瘤的定常流动的模拟

目的 应用两维对称模型模拟腹主动肪血管瘤的定常流动。方法 运用计算力学软件（FLUENTv4.3.2)进行数值模拟。结果 该研究给出了各种情况下的流动状态、流线分布、壁面剪切力和壁面压降的分布。结论 结果表明，腹主动脉血管瘤的形状和大小对流动状态影响不大，而雷诺数的增大会增大腹主动脉血管瘤内涡的强度。

SIMULATION OF STEADY FLOWS IN ABDOMINAL AORTIC ANEURYSM MODELS

Objective Two-dimensional symmetrical models are used to simulate the steady flow in the AAA models.Methods A commercial CFD software FLUENT v4.3.2 is used for the flow simulation of AAA models.Results The velocity vectors,streamlines,wall shear stresses and pressure drops in AAAs are examined.Reynolds number and diameter ratio which affected the flow pattern and wall shear stress in the aneurysm are dealt with.Conclusion The results show that the shape of AAA and the D/d ratio have little effect on the flow patterns but the increases of Reynolds number would strengthen the vortex within the AAA.