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Publications
Gonzalez-Cao, J., Dominguez, J.M., Gomez-Gesteira, M., Wang, S. and Guedes Soares, C. (2021), "Comparing mesh-free and mesh-based methods to deal with fluid-structure interaction problems", Marine Technology Workshop, 16-18 June, Vigo, Galicia, Spain, pp. 152-153
Coastal and marine engineering applications usually can be numerically reproduced by using two different methodologies: mesh-free and mesh-based methods. The mesh-based methods discretise the domain of study using fine meshes to study, for example, the propagation of waves. These methods usually require expensive mesh generation and have severe technical challenges associated with the implementation of conservative multi-phase schemes. Free surface elevation is obtained by using volume of fluid methods (VOF). The mesh-free methods discretise the fluid domain using particles. Then, these methods analyse the flow by following the fluid particles. The mesh-free methods allow overcoming part of the drawbacks that characterise the mesh-based schemes, despite their usually bigger computational cost. Methods such as Smoothed Particle Hydrodynamics (SPH) and the particle finite element method (PFEM) are examples of mesh-free schemes. In SPH no special tracking is used to detect the free surface and the domain is multiply-connected due to the Lagrangian nature the method. Consequently, large deformations can be efficiently treated since there is no mesh distortion, making SPH an ideal technique to study highly non-linear phenomena. González-Cao et al. show in [1] a comparison of this two methodologies applied to fluid-structure interaction (FSI) problems. The authors compare the results of the propagation of regular waves and their impacts on a static vertical wall of a structure with a cantilever slab using the mesh-free method DualSPHysics [2] and the mesh-based method IHFOAM [3].
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