# gst: sand dunes 'communication' via turbulent swirls

<< Even though they are inanimate objects, sand dunes can 'communicate' with each other. A team (..) has found that as they move, sand dunes interact with and repel their downstream neighbours. Using an experimental dune 'racetrack', (they) observed that two identical dunes start out close together, but over time they get further and further apart. This interaction is controlled by turbulent swirls from the upstream dune, which push the downstream dune away.  >>

Sand dunes can 'communicate' with each other. University of Cambridge. 

 Feb 4, 2020.

https://m.phys.org/news/2020-02-sand-dunes.html

Karol A. Bacik, Sean Lovett, et al. Wake Induced Long Range Repulsion of Aqueous Dunes. Phys. Rev. Lett. 124, 054501. Feb 4, 2020.

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.054501

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