Publications in Scientific Journals:
L. Mascotto, J. Melenk, I. Perugia, A. Rieder:
"FEM-BEM mortar coupling for the Helmholtz equation in three dimensions";
Computers and Mathematics with Applications,
80
(2020),
2351
- 2378.
English abstract:
We present a FEM-BEM coupling strategy for time-harmonic acoustic scattering in media with variable sound speed. The coupling is realized with the aid of a mortar variable that is an impedance trace on the coupling boundary. The resulting sesquilinear form is shown to satisfy a Gårding inequality. Quasi-optimal convergence is shown for sufficiently fine meshes. Numerical examples confirm the theoretical convergence results.
Keywords:
helmholtz equation, FEM-BEM coupling, stability
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1016/j.camwa.2020.04.014
Created from the Publication Database of the Vienna University of Technology.