Nie Wenjie, Lan Yueheng
Beijing Computational Science Research Center, Beijing 100084, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Jul;86(1 Pt 1):011110. doi: 10.1103/PhysRevE.86.011110. Epub 2012 Jul 9.
We study a fluctuation-driven ratchet-oscillator system that consists of two ratchet pinions in contact with thermal baths at different temperatures. Coupling between noncontact parts of the system is mediated by the Casimir force through a thin corrugated plate. Due to mutual rectification, the two ratchets achieve directed average motion in opposite directions. We numerically probe the average velocity, the Peclet number, and the thermal efficiency of the system as functions of the effective temperatures of the thermal baths and other important dimensionless control parameters. It is found that optimal parameter values exist which maximize the directed transport rate but with very low efficiency. We expect that the obtained results will help in the design of noncontact mechanical devices in the future.
我们研究了一个由两个与不同温度热浴接触的棘轮小齿轮组成的涨落驱动棘轮 - 振荡器系统。系统非接触部分之间的耦合是通过卡西米尔力经由一个薄波纹板介导的。由于相互整流作用，两个棘轮在相反方向上实现定向平均运动。我们数值探究了系统的平均速度、佩克莱数和热效率作为热浴有效温度及其他重要无量纲控制参数的函数。结果发现存在最优参数值，其能使定向传输速率最大化，但效率非常低。我们期望所获得的结果将有助于未来非接触机械装置的设计。
