Sound Barrier¶
Here we will perform a 2D simulations concerning wave propagation over a sound barrier.
Thereby the wave is excited by a point source on the right side of the barrier in the origin [x,y,z]=(0,0,0) of the domain.
For the analysis type, we chose a harmonic analysis in the frequency range of 34Hz to 680Hz with 10 linearly spaced samples.
Since we cannot create an infinitely large computational domain, we have to impose a model of free-radiation, in this example, we are using the PML (Perfectly Matched Layer) technique, described here.
Meshing¶
As a preprocessor we use the free available software gmsh
The gmsh file is provided here and the mesh can be generated by executing
XML Simulation Setup¶
The ready-to-use xml file is provided here as well as the material xml file.
Here, we will just discuss the main parts of the XML description file (for a deeper introduction into the different analysis types, we refer to the Cantilever example)
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Domains with regions
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Start the sequence and define analysis
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Define PDE for acoustics
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Define the PML (Perfectly Matched Layer) used for free field radiation
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Define excitation and output result
Perform the openCFS simulation by executing
Result¶
You can now investigate the results in paraview