Long-term spacetime plots of smooth sand


Below is a 14 hour space-time plot of my experiment. The picture axes are the same as in the other spacetime plots. There are 840 lines in the picture, with each horizontal line representing 1 minute. The dimensionless acceleration, G=1.05.

This picture shows a very nice and smooth transition from a level cell (green, at the top), to a single peak at the right edge of the cell and a valley at the left edge.



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