Maio 2014 vol. 1 num. 1 - 10th World Congress on Computational Mechanics
Full Article - Open Access.
THE NUMERICAL SIMULATION OF LARGE-SCALE FLUID-STRUCTURE INTERACTION PROBLEMS IN A FULLY COUPLED FORM
A fully coupled numerical algorithm has been developed for the numerical simulation of large-scale fluid structure interaction problems. The incompressible Navier-Stokes equations are discretized using an Arbitrary Lagrangian-Eulerian (ALE) formulation based on the side-centered unstructured finite volume method. The present arrangement of the primitive variables leads to a stable numerical scheme and it does not require any ad-hoc modifications in order to enhance the pressure-velocity coupling. A special attention is given to satisfy the discrete continuity equation within each element at discrete level as well as the Geometric Conservation Law (GCL). The nonlinear elasticity equations are discretized within the structure domain using the Galerkin finite element method. The resulting algebraic linear equations are solved in a fully coupled form. The implementation of the fully coupled preconditioned iterative solvers is based on the PETSc library for improving th! e efficiency of the parallel code. The present numerical algorithm is initially validated for a Newtonian fluid interacting with an elastic rectangular bar behind a circular cylinder and a three-dimensional elastic solid confined in a rectangular channel. ical Galerkin finite element is used to discretize the governing equations in a Lagrangian frame. The time integration method for the structure domain is based on the Newmark type generalized− method while the first-order backward difference is used in the fluid domain. The implementation of the preconditioned coupled iterative solvers is based on the PETSc library for improving the efficiency of the parallel code. The present numerical algorithm is validated for a steady and unsteady Newtonian fluid interacting with an elastic rectangular bar behind a circular cylinder and a three-dimensional elastic solid confined in a rectangular channel.
Palavras-chave: Fluid-Structure Interaction, Unstructured Finite Volume Method, Finite Element Method, Large Displacement, Large-Scale Computation, Monolitic Method.,
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Eken, A.; Sahin, M.; "THE NUMERICAL SIMULATION OF LARGE-SCALE FLUID-STRUCTURE INTERACTION PROBLEMS IN A FULLY COUPLED FORM", p. 2559-2577 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1].
São Paulo: Blucher,
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-18908
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