Erosion and deposition during flow through porous media can lead to large erosive bursts that manifest as jumps in permeability and pressure loss. Here we reveal that the cause of these bursts is the reopening of clogged pores when the pressure difference between two opposite sites of the pore surpasses a certain threshold. We perform numerical simulations of flow through porous media and compare our predictions to experimental results, recovering with excellent agreement shape and power-law distribution of pressure loss jumps, and the behavior of the permeability jumps as a function of particle concentration. Furthermore, we find that erosive bursts only occur for pressure gradient thresholds within the range of two critical values, independent of how the flow is driven. Our findings provide a better understanding of sudden sand production in oil wells and breakthrough in filtration.

中文翻译：

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多孔介质中爆发性冲蚀的机理

流经多孔介质的过程中发生的侵蚀和沉积可能导致大的冲蚀爆发，表现为渗透率和压力损失的跳跃。在这里，我们揭示出这些破裂的原因是当孔的两个相对位置之间的压力差超过某个阈值时，重新打开了被堵塞的孔。我们对通过多孔介质的流动进行了数值模拟，并将我们的预测结果与实验结果进行了比较，并以优异的一致形状和幂律分布恢复了压力损失跃变，渗透率跃迁的行为是​​颗粒浓度的函数。此外，我们发现侵蚀爆发仅在两个临界值范围内的压力梯度阈值发生，而与流的驱动方式无关。