Towards a natural element Lagrangian strategy in fluid-structure interaction
Résumé
Many efforts of research have been made in the Fluid-Structure Interaction (FSI) field in order to couple Eulerian (or ALE) formulations in the fluid domain with Lagrangian formulations in the solid domain. See, for instance, [8][16], just to cite a few. In some cases, however, the employ of Lagrangian formulations for both domains seems to be interesting. These cases include—but they are not restricted to—the presence of free surfaces in the fluid, for instance, whose accurate description requires an additional technique (ALE, VoF, level set, among them) in order to capture the position of the free surface. The development of meshless techniques in the nineties opened the possibility of employing Lagrangian formulations for both the solid and fluid domains. This is so since meshless methods are less sensible to “mesh” distortion (i.e., relative nodal displacement) than finite element methods are. Thus, it is possible to employ an updated Lagrangian strategy for the fluid domain, while employing a total or updated Lagrangian strategy for the solid. This approach is very convenient for some classes of problems, especially those involving drastic changes in the fluid domain geometry.
Origine : Fichiers produits par l'(les) auteur(s)
Loading...