[Zurück]

M. Kaltenbacher, A. Hüppe:
"Advanced Finite Element Formulation for the Convective Wave Equation";
Vortrag: Euronoise 2018, Kreta; 27.05.2018 - 31.05.2018; in: "Euronoise 2018", (2018), ISSN: 2226-5147; S. 291 - 296.

The convective wave equation models wave propagation in owing media by including convection
and refraction e ects. Thereby, the primary physical quantity is the scalar acoustic potential, which is
related to the acoustic pressure by the substantial derivative w.r.t time scaled by the mean density of
the medium. A standard Finite Element (FE) formulation of this partial di erential equation results
in spurious modes and may even become unstable. Therefore, we present a FE formulation, which
preserves the skew symmetry of the convective wave operator resulting in a stable computational
scheme independent of the Mach number. The properties are studied by performing an eigenvalue
analysis.

https://publik.tuwien.ac.at/files/publik_272558.pdf