Fictitious domain method to model a movable rigid body in a sound wave
-
D. Imbert
and
S. McNamara
Abstract
Motivated by experiments on the acoustics of submerged granular media, we have developed a new fictitious domain method that combines the acoustic wave equation with the equations of motion of a rigid body. The coupling is realized through the natural boundary conditions of the wave equation on the surface of the body and enforced with boundary Lagrange multipliers. The method is validated using analytic solutions for a movable rigid sphere in a sound wave. Results show that the method is promising because numerical results and analytic solutions are close for long wavelengths, although some deviations occur when the wavelength is smaller to the sphere radius. This method permits us to use a discrete element method for particle motion and interaction, and finite elements for wave propagation in the fluid.
© 2013 by Walter de Gruyter GmbH & Co.
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Articles in the same Issue
- Masthead
- Preface
- A non-standard FETI-DP mortar method for Stokes problem
- Implementation of a low order mimetic elements in freefem++
- Moving meshes with freefem++
- Mathematical modeling of heat treatment for a steering rack including mechanical effects
- A scenario for symmetry breaking in Caffarelli–Kohn–Nirenberg inequalities
- New development in freefem++
- Fictitious domain method to model a movable rigid body in a sound wave
- High performance domain decomposition methods on massively parallel architectures with freefem++
- Solution of 2D Boussinesq systems with freefem++: the flat bottom case
- A finite element BFGS algorithm for the reconstruction of the flow field generated by vortex rings
- Author Index
