Loose granular structures stabilized against gravity by an effective cohesiveforce are investigated on a microscopic basis using contact dynamics. We studythe influence of the granular Bond number on the density profiles and thegeneration process of packings, generated by ballistic deposition undergravity. The internal compaction occurs discontinuously in small avalanches andwe study their size distribution. We also develop a model explaining the finaldensity profiles based on insight about the collapse of a packing under changesof the Bond number.
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