基于ALE/SUPG同步交替法求解流固耦合问题  

Synchronized and staggered solution for fluid-structure interaction based on ALE/SUPG

作　　者：王学[1] 高普云[1] 任钧国[1] 吴志桥[1] 

机构地区：[1]国防科技大学航天与材料工程学院军事航天系,长沙410073

出　　处：《强度与环境》2009年第1期14-21,共8页Structure & Environment Engineering

摘　　要：该文基于预测-多步校正方法提出了流固耦合ALE/SUPG有限元同步交替求解法。流体动量方程采用SUPG有限元进行空间离散以消除对流项引起的数值振荡;时间域上的积分采用预测-多步校正(predictor-multicorrector)方法,对流体和结构同时进行预测;在多步校正的过程中对流体固体交替求解,从而在时间上达到同步推进。数值算例与Hughes,Chen等人的结果进行了比较,表明了该文方法的正确性。In his paper, some research on synchronized and staggered solution method for FSI based on ALE/SUPG finite elements are presented. With ALE description for FSI problems, SUPG finite elements method for fluid momentum equations was chosen to eliminate numerical spurious oscillations. Then predictor-multicorrctor method was used for time integration. Fluid and structure variables were predicted simultaneously in ：the predictor, and their governing equations were solved staggeringly in the ＇multicorrector＇. In this way fluid and structure variables could be synchronized. A computational procedure using above algorithm was developed to solve the problem of coupled vibration of a infinite circular cylinder in the homocentric circular domain filled with viscous fluid and the results were compared with Hughes＇ and Chen＇s .

关 键 词：ALE SUPG有限元 流固耦合 同步交替求解 整体法 时间步外交替法 

分 类 号：O35[理学—流体力学]