Code library and video for "Depinning as a coagulation process"


We consider a one-dimensional sandpile model which mimics an elastic string of particles driven through a strongly pinning periodic environment with phase disorder. The evolution towards depinning occurs by the triggering of avalanches in regions of activity which are at first isolated but later grow and merge. For large system sizes the dynamically critical behavior is dominated by the coagulation of these active regions. Our analysis of the evolution and numerical simulations show that the observed sizes of active regions is well-described by a Smoluchowski coagulation equation, allowing us to predict correlation lengths and avalanche sizes. Here we provide the Python source code used in this project, together with an animation showing the active region size distribution together with the Smoluchowski solution as time varies.
This research is supported by funding from the National Science Foundation, grant ID DMS-1148284

Access Conditions

Use and Reproduction
This work is licensed under a GNU GPL3 License


İşeri, Melih, and Kaspar, David C., "Code library and video for 'Depinning as a coagulation process'" (2016). Brown University Open Data Collection. Brown Digital Repository. Brown University Library.



  • Brown University Open … Thumbnail

    This digital archive contains open and publicly-funded data sets created by Brown University faculty and student researchers. Increasingly, academic societies, publishers, and funders are requiring that protocols, data sets, metadata, and code underlying published research be retained and preserved, their …