Hello again,
I have been playing with the equation 12.3 of the ElmerModelsManual and, although it gives different results from p(t), I do not find a physical sense to them.
I expected, for example, that at p(t)=0, no waves would be seen in space, however, the result is PW1. This is logical, considering that sin(0) =0.
From there, it is not possible to generate any instant in which the wavefront is at a distance X (tx) from the source.
- ScreenT0.png (503.43 KiB) Viewed 176 times
For example, in the following image the wavefront should not reach the acoustic screen (4m) or the upper edge of the domain (15m).
- ScreenT0292.png (537.72 KiB) Viewed 176 times
The same thing happens with the example of
https://www.elmerfem.org/forum/viewtopic.php?t=4553, where variation with respect to "t" is also seen, but the evolution of the wave front cannot be observed.
- tubo.png
- (118.14 KiB) Not downloaded yet
In conclusion of this whole matter:
- In 2D and 3D, Helmer Helmholtz gives different results
- In 2D, the "pressure wave" field represents the real and imaginary part
- Equation 12.3 of the models manual, referring to p(t), is not useful to see the evolution of the wave front over time, and I do not understand very well what physical meaning its results have.
Any ideas or contributions?
Thank you so much!