000015950 001__ 15950
000015950 005__ 20161115135334.0
000015950 04107 $$aeng
000015950 046__ $$k2013-06-12
000015950 100__ $$aEken, A.
000015950 24500 $$aA Parallel Fully Coupled Approach for Large-Scale Fluid-Structure Interaction Problems

000015950 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000015950 260__ $$bNational Technical University of Athens, 2013
000015950 506__ $$arestricted
000015950 520__ $$2eng$$aA 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 side-centered 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. The continuity equation is satisfied within each element exactly and the summation of the continuity equations can be exactly reduced to the domain boundary, which is important for the global mass conservation. A special attention is also given to satisfy the discrete geometric conservation law (DGCL). The nonlinear elasticity equations are discretized within the structure domain using the Galerkin finite element method. The structural behaviour of solid domain is governed by the the constitutive laws for the nonlinear Saint Venant-Kirchhoff material. The resulting algebraic nonlinear equations are solved in a fully coupled form using the restricted additive Schwarz method with the flexible GMRES(m) algorithm. The implementation of the fully coupled preconditioned iterative solvers is based on the PETSc library for improving the efficiency of the parallel code. The present numerical algorithm is validated for a Newtonian fluid interacting with an elastic rectangular bar behind a circular cylinder, a three-dimensional elastic solid confined in a rectangular channel and a pulsatile flow in a flexible tube, which mimics the case of pulsatile blood flow through elastic arteries.

000015950 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015950 653__ $$aFluid-Structure Interactions, Unstructured Finite Volume Method, Finite Element Method, Large Displacements, Large-Scale Computations; Monolithic Approaches.

000015950 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000015950 720__ $$aEken, A.$$iSahin, M.
000015950 8560_ $$ffischerc@itam.cas.cz
000015950 8564_ $$s3777512$$uhttps://invenio.itam.cas.cz/record/15950/files/2004.pdf$$yOriginal version of the author's contribution as presented on CD, section: SC-MS 10 SOME INTERACTION PROBLEMS IN COMPUTATIONAL MECHANICS
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000015950 962__ $$r15525
000015950 980__ $$aPAPER