Comparison of pressure and displacement formulations for finite elements in linear time-harmonic acoustics
We compare the Helmholtz equation in pressure and displacement formulation. We are not aware of any similar investigations and results. We use Lagrangian elements resp. RaviartThomas elements for the discretization. We show that RaviartThomas elements account for a reasonable alternative to Lagrangian elements in some cases.
raviartthomas elements source problem spectral problem