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http://hdl.handle.net/123456789/1947
Title: | Feynman-Smoluchowski engine at high temperatures and the role of constraints |
Authors: | Singh, Varinder Johal, R.S. |
Keywords: | Brownian motion Exact results Fluctuation phenomena Heat conduction |
Issue Date: | 2018 |
Publisher: | Institute of Physics Publishing |
Citation: | Journal of Statistical Mechanics: Theory and Experiment, 2018(7) |
Abstract: | Feynman's ratchet and pawl is a paradigmatic model for energy conversion using thermal fluctuations in the mesoscopic regime. Here, we optimize the power output of the ratchet as a heat engine in the high temperatures limit, and derive the universality of efficiency at maximum power up to second order, using a non-linear approximation. On the other hand, the linear model may be optimized by constraining the internal energy scales in different ways. It is shown that simple constraints lead to well-known expressions of thermal efficiency in finite-time thermodynamics. Thereby, the constrained ratchet, in the linear regime, has been mapped to an effective finite-time thermodynamic model. |
URI: | https://iopscience.iop.org/article/10.1088/1742-5468/aacfba http://hdl.handle.net/123456789/1947 |
Appears in Collections: | Research Articles |
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