Tuković, Željko

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Conference Paper, Published VersionTuković, ŽeljkoApplication of overset mesh for simulating fluid-structureinteraction using foam-extend 4.1Verfügbar unter/Available at: https://hdl.handle.net/20.500.11970/105368Vorgeschlagene Zitierweise/Suggested citation:Tuković, Željko (2018): Application of overset mesh for simulating fluid-structure interactionusing foam-extend 4.1. In: Bundesanstalt für Wasserbau (Hg.): BAW-WorkshopOpenFOAM® in Hydraulic Engineering. Karlsruhe: Bundesanstalt für Wasserbau. S. 21-21.Standardnutzungsbedingungen/Terms of Use:Die Dokumente in HENRY stehen unter der Creative Commons Lizenz CC BY 4.0, sofern keine abweichendenNutzungsbedingungen getroffen wurden. Damit ist sowohl die kommerzielle Nutzung als auch das Teilen, dieWeiterbearbeitung und Speicherung erlaubt. Das Verwenden und das Bearbeiten stehen unter der Bedingung derNamensnennung. Im Einzelfall kann eine restriktivere Lizenz gelten; dann gelten abweichend von den obigenNutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte.Documents in HENRY are made available under the Creative Commons License CC BY 4.0, if no other license isapplicable. Under CC BY 4.0 commercial use and sharing, remixing, transforming, and building upon the materialof the work is permitted. In some cases a different, more restrictive license may apply; if applicable the terms ofthe restrictive license will be binding.Bundesanstalt für Wasserbau  Workshop OpenFOAM in Hydraulic Engineering  ▪  21/22 November 2018 Application of overset mesh for simulating fluid-structure interaction using foam-extend 4.1 Author: Željko Tuković, University of Zagreb, Croatia It is presented an extension of the open-source fluid-structure interaction (FSI) toolbox solids4foam to enable application of the overset mesh methodology recently implemented in the foam-extend. In the solids4foam toolbox, the fluid flow is described by the Navier-Stokes equations in the arbitrary Lagrangian-Eulerian form, while the momentum equation in the total or updated Lagrangian form is used to describe the solid deformation. Both the fluid and the solid are discretised in space using the second-order accurate cell-centred finite volume method and the second-order accurate implicit scheme is used for temporal discretization. The adjustment of the fluid mesh to the time varying shape of the deformable body is usually carried out by mesh deformation, where the internal mesh vertices are moved based on the prescribed motion of the boundary vertices, while the topology of the mesh stays unchanged. In the overset mesh approach, the fluid mesh is composed of one background mesh and one or more foreground meshes attached to the moving/deforming bodies. Motion of the foreground meshes independently from the background mesh should enable much higher motion amplitudes during FSI simulations. Application of overset mesh in the FSI calculation framework required series adjustments related to the mesh deformation solvers and support for high order temporal discretization schemes. Figure 1: Turek and Hron FSI-2 test case: foreground mesh deformed by RBF mesh motion solver. Literature Cardiff, P.; Karač, A.; De Jaeger, P; Jasak, H.; Nagy, J.; Ivanković, A; Tuković, Ž (2018): An open-source finite volume toolbox for solid mechanics and fluid-solid interaction simulations. In: Computer Physics Communications, submitted for review. Available online at https://arxiv.org/abs/1808.10736v2. Tuković, Ž.; Jasak, H.; Karač, A.; Cardiff, P.; Ivanković, A. (2018): OpenFOAM finite volume solver for fluid-solid interaction. In: Transactions of Famena, 42 (3), pp. 1-31. Available online at https://hrcak.srce.hr/206941. 21

Application of overset mesh for simulating fluid-structure interaction using foam-extend 4.1

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Application of overset mesh for simulating fluid-structure interaction using foam-extend 4.1

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