无偏外力驱动的通道布朗泵
A channel Brownian pump powered by an unbiased external force
摘要:
研究了非对称有限管内粒子在无偏外力作用下的布朗泵。泵送系统由两个颗粒储存器限定。发现颗粒可以通过该管从低浓度的储存器泵送到相同或更高浓度的储存器。存在一个最佳温度值(或外力幅值),此时泵送能力最大。泵送能力随管瓶颈处半径的增大而减小。
英文摘要:
A Brownian pump of particles in an asymmetric finite tube is investigated in the presence of an unbiased external force. The pumping system is bounded by two particle reservoirs. It is found that the particles can be pumped through the tube from a reservoir at low concentration to one at the same or higher concentration. There exists an optimized value of temperature (or the amplitude of the external force) at which the pumping capacity takes its maximum value. The pumping capacity decreases with increasing the radius at the bottleneck of the tube.
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