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Applications of Mathematics

, Volume 63, Issue 6, pp 739–764 | Cite as

Space-time discontinuous Galerkin method for the solution of fluid-structure interaction

  • Monika Balázsová
  • Miloslav Feistauer
  • Jaromír Horáček
  • Martin Hadrava
  • Adam Kosík
Article
  • 17 Downloads

Abstract

The paper is concerned with the application of the space-time discontinuous Galerkin method (STDGM) to the numerical solution of the interaction of a compressible flow and an elastic structure. The flow is described by the system of compressible Navier-Stokes equations written in the conservative form. They are coupled with the dynamic elasticity system of equations describing the deformation of the elastic body, induced by the aerodynamical force on the interface between the gas and the elastic structure. The domain occupied by the fluid depends on time. It is taken into account in the Navier-Stokes equations rewritten with the aid of the arbitrary Lagrangian-Eulerian (ALE) method. The resulting coupled system is discretized by the STDGM using piecewise polynomial approximations of the sought solution both in space and time. The developed method can be applied to the solution of the compressible flow for a wide range of Mach numbers and Reynolds numbers. For the simulation of elastic deformations two models are used: the linear elasticity model and the nonlinear neo-Hookean model. The main goal is to show the robustness and applicability of the method to the simulation of the air flow in a simplified model of human vocal tract and the flow induced vocal folds vibrations. It will also be shown that in this case the linear elasticity model is not adequate and it is necessary to apply the nonlinear model.

Keywords

nonstationary compressible Navier-Stokes equations time-dependent domain arbitrary Lagrangian-Eulerian method linear and nonlinear dynamic elasticity space-time discontinuous Galerkin method vocal folds vibrations 

MSC 2010

65M60 65M99 74B05 74B20 74F10 

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Copyright information

© Institute of Mathematics of the Academy of Sciences of the Czech Republic, Praha, Czech Republic 2018

Authors and Affiliations

  • Monika Balázsová
    • 1
  • Miloslav Feistauer
    • 1
  • Jaromír Horáček
    • 2
  • Martin Hadrava
    • 1
  • Adam Kosík
    • 1
  1. 1.Charles UniversityFaculty of Mathematics and PhysicsPraha 8Czech Republic
  2. 2.Institute of ThermomechanicsAcademy of Sciences of the Czech RepublicPraha 8Czech Republic

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