Numerical Simulation of Laminar Incompressible Fluid-Structure Interaction for Elastic Material with Point Constraints

M. Razzaq (), J. Hron () and S. Turek ()
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M. Razzaq: Institute of Applied Mathematics, TU Dortmund
J. Hron: Institute of Mathematics, Charles University
S. Turek: Institute of Applied Mathematics, TU Dortmund

A chapter in Advances in Mathematical Fluid Mechanics, 2010, pp 451-472 from Springer

Abstract: Abstract We present numerical techniques for solving the problem of fluid structure interaction with a compressible elastic material in a laminar incompressible viscous flow via fully coupled monolithic Arbitrary Lagrangian-Eulerian (ALE) formulation. The mathematical description and the numerical schemes are designed in such a way that more complicated constitutive relations can be easily incorporated. The whole domain of interest is treated as one continuum and we utilize the well known Q 2 P 1 finite element pair for discretization in space to gain high accuracy. We perform numerical comparisons for different time stepping schemes, including variants of the Fractional-Step-θ-scheme, Backward Euler and Crank-Nicholson scheme for both solid and fluid parts. The resulting nonlinear discretized algebraic system is solved by a quasi-Newton method which approximates the Jacobian matrices by the divided differences approach and the resulting linear systems are solved by a geometric multigrid approach. In the numerical examples, a cylinder with attached flexible beam is allowed to freely rotate around its axis which requires a special numerical treatment. By identifying the center of the cylinder with one grid point of the computational mesh we prescribe a Dirichlet type boundary condition for the velocity and the displacement of the structure at this point, which allows free rotation around this point. We present numerical studies for different problem parameters on various mesh types and compare the results with experimental values from a corresponding benchmarking experiment.

Keywords: Fluid-structure interaction; Monolithic FEM; Incompressible Navier-Stokes equations; ALE; Multigrid (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1007/978-3-642-04068-9_27

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