Accuracy and performance of fluid-structure interaction algorithms with explicit versus implicit formulations of the fluid solver
Accuracy and performance of fluid-structure interaction algorithms with explicit versus implicit formulations of the fluid solver
复制标题
使用流体求解器的显式与隐式公式的流固耦合算法的准确性和性能
DOI：
10.2514/6.2017-3449
复制
发表时间：
2017
影响因子：
2.6
通讯作者：
Y. Peet
中科院分区：
文献类型：
--
作者：
Yiqin Xu;Y. Peet
流固耦合（Fluid Structural Interaction，FSI）是指在流体流动的影响下，固体结构发生变形或振动，从而产生双向耦合的问题，如风力涡轮机、翼型、降落伞、生物系统（包括动脉瘤）等。目前的求解器大多采用隐式方法求解流体，其中最常用的是Newton-Raphson方法。然而，显式方法相对便宜。本文通过一个FSI标准算例，将子迭代显式方法与Newton-Raphson方法进行了比较。我们专注于比较的精度以及计算性能的两种方法。
Fluid structure interaction (FSI) describes a problem when a solid structure deforms or oscillates by the influence of the fluid flow, and thus a two-way interaction occur, such as in wind turbines, airfoils, parachutes, biological systems, including aneurysms, etc. One of the major challenges in the numerical simulation of this problem is the computational cost, and most of the current solvers are using an implicit method for fluid, with Newton-Raphson method being the most popular. However, an explicit method is relatively cheap. In this paper, explicit method with sub-iterations is compared with a Newton-Raphson method through an FSI benchmark case. We concentrate on comparison of accuracy as well as the computational performance of the two methods.