Multiphysics simulation of flow-induced vibrations and aeroelasticity on parallel computing platforms

“…Fluid-Structure Interaction problems often show strong interplay between the fluid and the structure [1,12], be it in the design of aircraft [2,3], helicopters [4,5], in the consideration of sloshing in tanks [6], or be it in biomechanical applications [7] -see also the examples in [14].…”

Section: Introductionmentioning

confidence: 99%

Partitioned strong coupling algorithms for fluid–structure interaction

Matthies

Steindorf

2003

Computers & Structures

245

141

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Numerical simulation of fluid-structure interaction is often attempted in the context of partitioned methods, where already existing solvers for fluid or structure alone are used jointly. Mostly this is done by exchanging information from time step to time step in an alternating fashion. These weak coupling methods are explicit and hence suffer from possible instabilities. Therefore often strong coupling -where equlibrium is satisfied jointly between fluid and structure in each time step -is desired; the simplest computational procedure is similar to the time stepping an alternating iteration. We show why also this approach may experience difficulties, and how they may be circumvented with block-Newton methods, still in the partitioned framework, by only using the solvers of the subproblems fluid and structure.

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“…In FSI analysis, the method used to satisfy the geometrical compatibility and the equilibrium conditions on the interface between the fluid and the structure is one of the key factors. For this purpose, the weak coupling method (iterative method), the strong coupling method (direct method), and the constraint method [5] have been used to solve the same fundamental continuum and discretized equations.…”

Section: Introductionmentioning

confidence: 99%

Studies of the strong coupling and weak coupling methods in FSI analysis

Zhang

Hisada

2004

Numerical Meth Engineering

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SUMMARYThe weak coupling methods in fluid-structure interaction analysis are newly classified into three types; the weak coupling method for solving structures with interfaces, the weak coupling method for solving fluids with interfaces, and the weak coupling method for solving both fluids and structures with interfaces. The consistent added matrices of these weak coupling methods are derived from the condensation of the strong coupling formulation. Some approximations for the consistent added matrices, which can avoid the matrix coupling, are proposed. The reasons for convergence difficulty in the weak coupling methods are clarified. A number of numerical results are presented to investigate the convergence properties and computational efficiency of these methods.

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Multiphysics simulation of flow-induced vibrations and aeroelasticity on parallel computing platforms

Cited by 40 publications

References 24 publications

Improving the performance of the partitioned QN-ILS procedure for fluid–structure interaction problems: Filtering

Improving the performance of the partitioned QN-ILS procedure for fluid–structure interaction problems: Filtering

Partitioned strong coupling algorithms for fluid–structure interaction

Studies of the strong coupling and weak coupling methods in FSI analysis

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