Abstract
When a granular media having a subharmonic pattern is simulated, the first challenge is to define the surface contour of the granular media. This work proposes a method to define this contour. After define this contour, we propose an automated method to detect the presence or absence of the subharmonic oscillation pattern. Finally, with this information, we used the results to study the dispersion relation of the subharmonic pattern and its dependence with the depth of the granular media, resulting in a coincidence with the dispersion relation for shallow water.
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