Dear Forum,
Thank you for the amazing toolbox. It's been very useful.
I was wondering if there are any systematic comparisons of K-wave with theoretical solutions (just want to have some understanding of its failure modes, especially for sharp boundaries)? I've been looking for publications but haven't found such comparisons yet. Could you point me to one? Thank you for your time!
Best,
Elyn
Hi Elyn,
There are quite a few examples depending on what you want. A non-exhaustive list:
https://doi.org/10.1121/1.4712021 compares with the analytical solutions for the reflection and transmission coefficient
https://dx.doi.org/10.1121/10.0002177 compares with the analytical solution for scattering from a penetrable sphere
https://dx.doi.org/10.1109/TUFFC.2019.2941795 compares with experiments for layered media
https://dx.doi.org/10.1121/1.4976339 compares with analytical solutions for different skull-tissue interfaces
https://dx.doi.org/10.1088/1361-6560/aa5e98 compares with experimental measurements for skull phantoms
You can also see here for a full list of publications.
Brad.
Thank you so much for your reply! I'll look into them.
Best,
Elyn
Hi Bradley.
I am trying to do some 3D propagation modelling using pstdElastic3D, but the results are far from the theoretically ones.
For instance the scattering from a solid sphere (vl=4210; vt=2030; ro=2170) inside solid media (vl=5830; vt=3090; ro=7920) in Rayleigh regime give rise to a power dependence with scatter radius (r) around 2.3(scat=k*r^2.3), instead of the theoretical 6 exponent (scat=k*r^6).
I am aware that this is for sure related to the fact that the simulations are based on structured grids and is difficult to model the complex diffraction pattern and mode conversion in the borders of the sphere. The increasing of number of points per wavelength used is only way to try to solve the problem? Do you now any previous work that deals with comparison of this problem results with theoretical ones?
Thank you for your time!
Regards.
Hi marioj,
You could see this paper for a comparison from a fluid sphere with k-Wave. Indeed, this type of example takes longer to converge. Not sure in the elastic case unfortunately.
Brad.
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