In numerical simulations, the partitioned approach allows treating a multi-physics phenomenon as two different computational fields, which are solved separately with their respective mesh discretisation and algorithms. This is of particular interest to fluid–structure interaction (FSI) problems for their complex resolution. In this respect, through the partitioned approach, ModsFsiFoam (MODalSuperpositionFsiFoam) solver has been developed. It allows the application of two different methods for fluid and solid solutions. In particular, it is based on a theoretical approach, the modal superposition principle, for the structural solution; this method provides a certain result for the linear structural field. The FVM (Finite VolumeMethod), by far the most widely used method for fluid-dynamics and gas-dynamics problems, has been used instead to solve the Navier–Stokes equations for an incompressible laminar flow of Newtonian fluid. The interfacial conditions have been used to pass information between the domains through a coupling algorithm. Implemented in OpenFOAM, a development environment consisting of libraries and applications for Linux distributions, written in the C++ source code, ModsFsiFoam solver has been already applied with satisfactory results to a typical fluid–structure interaction case found in literature, i.e. a system composed by an inverted flag treated as a flexible lamina, clamped to a wind tunnel wall, in which airflow is introduced in the axial direction. In this work, ModsFsiFoam solver outputs are compared with a system, the results of which are known for both fluid-dynamics and structural fields. The configuration consists of a laminar incompressible channel flow around a solid structure with an elastic part.

在数值模拟中，分区方法允许将多物理场现象视为两个不同的计算领域，分别用各自的网格离散化和算法求解。这对流固耦合 (FSI) 问题的复杂分辨率特别感兴趣。在这方面，通过分区方法，开发了 ModsFsiFoam（MODalSuperpositionFsiFoam）求解器。它允许对流体和固体溶液应用两种不同的方法。特别是，它基于一种理论方法，即模态叠加原理，用于结构解；该方法为线性结构场提供了一定的结果。FVM（有限体积法），迄今为止最广泛用于流体动力学和气体动力学问题的方法，已被用来解决牛顿流体不可压缩层流的纳维-斯托克斯方程。界面条件已用于通过耦合算法在域之间传递信息。在 OpenFOAM 中实现，这是一个由 Linux 发行版的库和应用程序组成的开发环境，用 C++ 源代码编写，ModsFsiFoam 求解器已经应用于文献中发现的典型流固耦合案例，即一个由倒旗被视为柔性薄板，夹在风洞壁上，气流沿轴向引入风洞壁。在这项工作中，ModsFsiFoam 求解器的输出与一个系统进行了比较，该系统的结果在流体动力学和结构领域都是已知的。