颗粒体系中的电致可调凝聚力
Electrically induced tunable cohesion in granular systems
摘要：
本文报道了在电场作用下，封闭颗粒材料产生cohesion内聚力的实验观察。发现休止角随着cohesion内聚力的增大而增大。本文提出了一个考虑侧墙效应和粘聚力的颗粒堆稳定性理论模型。该模型与实验结果吻合较好，除高场强和低流速外，稳态流动角几乎不受电场的影响。
英文摘要：
Experimental observations of confined granular materials in the presence of an electric field that induces cohesive forces are reported. The angle of repose is found to increase with the cohesive force. A theoretical model for the stability of a granular heap, including both the effect of the sidewalls and cohesion is proposed. A good agreement between this model and the experimental results is found. The steady-state flow angle is practically unaffected by the electric field except for high field strengths and low flow rates.
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