This paper deals with the finite element approximation of the displacement formulation of the spectral acoustic problem on a curved non convex two-dimensional domain Ω. Convergence and error estimates are proved for Raviart-Thomas elements on a discrete polygonal domain Ωh ***inline equation*** Ω in the framework of the abstract spectral approximation theory. Similar results have been previously proved only for polygonal domains. Numerical tests confirming the theoretical results are reported.
['Erwin Hernández', 'Rodolfo Rodríguez']
Finite element approximation of spectral acoustic problems on curved domains