摘要
针对IQN-ILS流固耦合分离迭代算法存在的稳定性问题,对如何在管道流动的流固耦合数值模拟中提高计算稳定性进行了研究,提出了将松弛因子引入IQN-ILS算法和混合使用Aitken和IQN-ILS的两种基于IQN-ILS算法的改进算法,在CFD开源C++类库Open Foam的基础上开发了新的流固耦合求解器,编程实现了提出的改进算法,并通过二维标准算例验证了所开发的流固耦合解器的有效性,最终将改进算法应用到三维管道流动算例中。研究结果表明,所提出的改进算法均能够提高计算的稳定性,取得了很好的效果。
Aiming at stability performance of IQN-ILS which is a partitioned algorithm for fluid-structure interaction,how to enhance the computational stability in numerical simulation of fluid-structure interaction for pipe flow were studied. Two kinds of improved algorithms based on IQN-ILS algorithm that one is introducing the relaxation factor to IQN-ILS and the anther is combining Aitken with IQN-ILS were proposed. By using Open Foam which is an open source library of CFD developed by C＋＋,the new fluid-structure interaction solver was developed and improved algorithms were implemented. Two dimensional benchmark was used to verify the effectiveness of the solver newly developed. Finally,the improved algorithms were applied to the three dimensional example for pipe flow. The results indicate that the improved algorithms can enhance the computational stability and achieve good results.
出处
《机电工程》
CAS
2015年第4期469-473,共5页
Journal of Mechanical & Electrical Engineering
