Denisov D V, Villanueva Y Y, Wijngaarden R J
Department of Physics, Faculty of Sciences, VU University Amsterdam, Amsterdam, The Netherlands.
Phys Rev E Stat Nonlin Soft Matter Phys. 2011 Jun;83(6 Pt 1):061301. doi: 10.1103/PhysRevE.83.061301. Epub 2011 Jun 22.
Using a modified Bak-Tang-Wiesenfeld model for sand piles, we simulate a Casimir-like effect in a granular pile with avalanches. Results obtained in the simulation are in good agreement with results previously acquired experimentally: two parallel walls are attracted to each other at small separation distances, with a force decreasing with increasing distance. In the simulation only, at medium distances a weak repulsion exists. Additionally, with the aim of avalanche prevention, the possibility of suppressing self-organized criticality with an array of walls placed on the slope of the pile is investigated, but the prevention effect is found to be negligible.
我们使用改进的沙堆Bak-Tang-Wiesenfeld模型，模拟了具有雪崩现象的颗粒堆中的类卡西米尔效应。模拟结果与先前的实验结果高度吻合：在较小的间距下，两个平行壁会相互吸引，且力随距离增加而减小。仅在模拟中，在中等距离时存在微弱的排斥力。此外，为了防止雪崩，研究了在堆的斜坡上放置一系列壁来抑制自组织临界性的可能性，但发现预防效果可忽略不计。
