Article (Scientific journals) Hybridized enriched space-time finite element method for analysis of thin-walled structures immersed in generalized Newtonian fluids
2010 • In Computers and Structures, 88 (21-22), p. 1265-1277
Peer Reviewed verified by ORBiKeywords :
Embedded thin structure; Enriched space-time approximation; Fluid-structure interaction; Strong coupling; Approximation spaces; Enriched space-time finite elements; Fluid-structure interaction problem; Generalized Newtonian fluid; Hybrid interface; Non-smooth; Numerical treatments; Simultaneous solution; Space-time finite element method; Thin structure; Velocity-based; Compressible flow; Fluid structure interaction; Fluids; Lagrange multipliers; Thin walled structures; Finite element method
Abstract :
[en] The paper addresses the numerical treatment of a specific class of fluid-structure interaction problems: flow-immersed thin structures undergoing considerable motion and deformation. The simultaneous solution procedure uses a mixed-hybrid velocity-based formulation of both fluid and structure discretized by a stabilized time-discontinuous space-time finite element method. The continuity at the interface is ensured by a localized mixed-hybrid interface method avoiding Lagrange multipliers and penalty approaches. The XFEM is utilized for enrichment of the approximation space of the fluid variables in order to represent non-smooth (discontinuous) solution features resulting from immersing a thin structure in a fluid. © 2010 Elsevier Ltd. All rights reserved.
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