考虑流固耦合作用的主动脉弓血液流动分析_宋江湖.pdfVIP

27 3 Vol. 27 No. 3 2008 6 Chinese Journal of Biomedical Engineering June 2008 1 1* 2 宋江湖 陈国定 任延平 1( , 710072) 2( , 710061) : -, , , , , , : , ; ; , 25% : ; ; ; Blood Flow Analysis in Aortic Arch with Fluid-Structure Interaction 1 1* 2 SONG Jiang-Hu CHEN Guo-Ding REN Yan-Ping 1( School of Mechatronic Engineering , Northwestern Polytechnical University, Xian 710072) 2 ( Geriatric Cardiovascular De artment, First Hos ital of Xi. an Jiaotong University , Xian 710061) Abstract: T e fluid-structure interaction ( FSI) greatly affects blood blow, reserved flow and wall s ear stress in aortic arc . But so far, few investigations ave considered t e interaction between blood and vessels and t e influence from psyc ological pulse. In t is paper, t e ascending aorta, t e aortic arc and t e descending aorta were considered in t e geometric model. T e FSI was used to study t e blood flow in t e aortic arc according to t e p ysiologically pulsatile conditions. It was demonstrated t at t e velocity of blood and wall s ear stress in aortic arc were rarely affected by FSI, but t e FSI ad great affects on t e magnitude of blood flow and wall s ear stress in t e aortic arc . At t emoment w en systole switc ing into diastole, t e blood flow produced countercurrent; T e reversed flow was lower considering FSI; T ewall s ear stress was reduced by 25% in FSI compared wit rigid wall. Key words:aortic arc ; fluid-structure interaction; wall s ear stress; reserved flow