Die Application Gallery bietet COMSOL Multiphysics® Tutorial- und Demo-App-Dateien, die für die Bereiche Elektromagnetik, Strukturmechanik, Akustik, Strömung, Wärmetransport und Chemie relevant sind. Sie können diese Beispiele als Ausgangspunkt für Ihre eigene Simulationsarbeit verwenden, indem Sie das Tutorial-Modell oder die Demo-App-Datei und die dazugehörigen Anleitungen herunterladen.
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Finding acoustic eigenmodes in problems solved with linearized convected acoustic interfaces can be a challenging task. The solution will most often return several non-acoustic vorticity and entropy modes. These are highly damped waves that do not propagate at the speed of sound but with ... Mehr lesen
The dispersion curves for a fluid-filled pipe with elastic walls are computed and compared with the analytical results for a pure elastic and an acoustic waveguide, respectively. Results show good agreement and also provide insight into the dynamics of the fluid-filled pipe at low and ... Mehr lesen
The behavior of the diffuse sound field in two coupled rooms is investigated using the Acoustic Diffusion Equation interface. The model setup is based on the paper by Xiang and others, J. Acoust. Soc. Am., vol. 126, p. 1187, 2009. The model determines the sound pressure level ... Mehr lesen
The dipole tonal noise generated by flow over a cylinder in free space is modeled using a two step hydrodynamic/acoustic splitting method. First, the unsteady hydrodynamic flow field is calculated using the incompressible Navier-Stokes equations. Second, the Linearized Perturbed ... Mehr lesen
It can in many cases be difficult to get accurate material properties for porous materials. Measuring the properties to high precision can involve lengthy measurements using different techniques. It can therefore be interesting to understand how uncertainties in different material ... Mehr lesen
Stimulated Brillouin Scattering (SBS) describes a nonlinear interaction between light and sound. In optical fibers, SBS can be detrimental for power or communication purposes, but can be leveraged for sensing applications. The SBS gain spectrum quantifies the optic-acoustic mode ... Mehr lesen
The sound distribution from a TV in a two-room apartment is computed. The simulation demonstrates the use of the Acoustic Diffusion Equation interface to get a quick and simple estimate of the local sound pressure level. For increased accuracy, an analytical expression for the direct ... Mehr lesen
Die Lösung sehr großer Druckakustikmodelle im Frequenzbereich kann eine Herausforderung darstellen. Für die Standard-Physikkonfigurationen und die standardmäßige quadratische Lagrange-Diskretisierung gibt es mehrere Vorschläge für iterative Löser. Bei sehr großen Modellen kann es ... Mehr lesen
This model analyzes the uncertainty in focused ultrasound induced tissue heating. The material properties for the tissue mimicking material, including the uncertainty, are taken from the FDA Medical Device Development Tool: Tissue Mimicking Material (TMM) for Preclinical Acoustic ... Mehr lesen
