Dynamic Mesh Handling in OpenFOAM Applied to Fluid-Structure Interaction Simulations

Jasak, Hrvoje and Tuković, Željko (2010) Dynamic Mesh Handling in OpenFOAM Applied to Fluid-Structure Interaction Simulations. = Dynamic Mesh Handling in OpenFOAM Applied to Fluid-Structure Interaction Simulations. In: V European Conference on Computational Fluid Dynamics ECCOMAS CFD 2010, 14-17.06.2010., Lisbon; Portugal.

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Abstract

The power of OpenFOAM [1] in physical modelling stems from mimicking of partial di erential equations in software, thus allowing rapid and reliable implementation of complex physical models. State-of-the art complex geometry handling and dynamic mesh features are essential for practical engineering use. This paper describes features of dynamic mesh support in OpenFOAM. Polyhedral mesh handling implemented in OpenFOAM is a exible basis for its dynamic mesh features, at several levels. For simple cases of linear deformation or solid body mo- tion, algebraic expressions suce. For complex cases of time-varying geometry [2] or solution dependent motion, mesh deformation is obtained by solving a mesh motion equation. For extreme deformation, automatic motion is combined with topological changes, where the number or points, faces or cells in the mesh or its connectivity changes during the simulation. Finally, in cases of extreme and arbitrary mesh motion tetrahedral re-meshing based on edge swapping may be used. Examples of dynamic mesh handling with progressively complex requirements shall be used to show how object-oriented programming simpli es the use of dynamic mesh features with various physics solvers. A self-contained Fluid-Structure Interaction (FSI) solver in OpenFOAM acts as an illustration of dynamic meshing features and parallelised surface data transfer tools. It combines a second-order Finite Volume fluid flow solver with moving mesh support coupled to a large deformation formulation of the structural mechanics equations in an updated Lagrangian form [3].

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): OpenFOAM; Dynamic Mesh; Finite Volume; CFD; Fluid-Structure
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 06 Jul 2015 08:11
Last Modified: 05 Apr 2017 08:45
URI: http://repozitorij.fsb.hr/id/eprint/4432

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