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Simple question regarding time-harmonic plane wave
Posted 27.05.2010, 06:33 GMT-4 0 Replies
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In COMSOL I have created the plane wave and assigned expressions for the incident wave amplitude and incident pressure wave.
The model is set as stationary time-harmonic with the pressure acoustics app mode.
The domain is just a 2D circle with an outer boundary with radiation condition settings and the subdomain is set to the properties of water.
I experimented to compare the solution for when there is a cylinder object in the centre and when there is no geometry at all.
When there is an object present I get values for the fluctuating pressure and can see the scattering effects as expected, but when there is no object there, and I just want to observe the pressure wave in the domain, the solution gives me zero pressure.
I am very confused why COMSOL would not recognise the plane wave when the object is absent.
Does this have something to do with it being time-harmonic? Or could it be because it is a continuous wave coming from infinity and going to infinity?
Help!
Many thanks!!
Eileen =)
Hello Eileen Kolster
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