Load and motion transfer algorithms for fluid/structure interaction problems with non-matching discrete interfaces: Momentum and energy conservation, optimal discretization and application to aeroelasticity
Load and motion transfer algorithms for fluid/structure interaction problems with non-matching discrete interfaces: Momentum and energy conservation, optimal discretization and application to aeroelasticity
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DOI：
10.1016/s0045-7825(97)00216-8
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发表时间：
1998-04-28
影响因子：
7.2
通讯作者：
LeTallec, P
中科院分区：
文献类型：
--
作者：
Farhat, C;Lesoinne, M;LeTallec, P
要预测许多流体/结构相互作用现象，需要用一组适当的界面边界条件同时求解流体和结构的耦合平衡方程。本文考虑了流体子问题和结构子问题具有不同的分辨率要求，并且它们的计算域具有不匹配的离散界面的实际情况，并讨论了控制界面边界条件的适当离散化。我们介绍和概述了新的和通用的算法，用于将流体/结构界面上的流体压力和应力场转换为结构载荷，并将结构运动传递到流体系统。我们讨论了这些算法在守恒性和解的精度方面的优点，并区分了理论上有意义的问题和实际有意义的问题。我们用几个瞬变气动弹性模拟来验证我们的主张并说明我们的结论。(C)1998年爱思唯尔科学公司。
The prediction of many fluid/structure interaction phenomena requires solving simultaneously the coupled fluid and structural equations of equilibrium with an appropriate set of interface boundary conditions. In this paper, we consider the realistic situation where the fluid and structure subproblems have different resolution requirements and their computational domains have non-matching discrete interfaces, and address the proper discretization of the governing interface boundary conditions. We present and overview new and common algorithms for converting the fluid pressure and stress fields at the fluid/structure interface into a structural load, and for transferring the structural motion to the fluid system. We discuss the merits of these algorithms in terms of conservation properties and solution accuracy, and distinguish between theoretically important and practically significant issues. We validate our claims and illustrate our conclusions with several transient aeroelastic simulations. (C) 1998 Elsevier Science S.A.