Zheng Jianzhou, Zheng Xiao, Yam ChiYung, Chen GuanHua
Department of Chemistry, University of Hong Kong, Hong Kong, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Jun;81(6 Pt 1):061104. doi: 10.1103/PhysRevE.81.061104. Epub 2010 Jun 2.
In this work, we introduce two models of Feynman's ratchet and pawl system. Molecular dynamics is carried out to simulate the two designs for Feynman's ratchet and pawl systems followed by a Langevin dynamics simulation of the reduced system. We find that the ratchet will rotate as designed when the temperature of the pawl chamber is lower than that of the ratchet chamber, which is consistent with the second law of thermodynamics. Different parameters and configurations are tested, and the results show that the efficiency of the ratchet depends on the applied torque. We find further that efficiencies of the Feynman's ratchet and pawl systems depend greatly on the details of the systems.
在这项工作中，我们介绍了费曼棘轮和棘爪系统的两种模型。进行了分子动力学模拟，以模拟费曼棘轮和棘爪系统的两种设计，随后对简化系统进行了朗之万动力学模拟。我们发现，当棘爪腔的温度低于棘轮腔的温度时，棘轮将按设计旋转，这与热力学第二定律一致。测试了不同的参数和配置，结果表明棘轮的效率取决于所施加的扭矩。我们进一步发现，费曼棘轮和棘爪系统的效率在很大程度上取决于系统的细节。
