Stochastic heat engine using an active particle.
| Autor: | Kumari A; Department of Physics, Birla Institute of Technology, Mesra, Ranchi, Jharkhand 835215, India., Pal PS; Department of Physics, University of Maryland, Baltimore County, Baltimore, Maryland 21250, USA., Saha A; Department of Physics, Savitribai Phule Pune University, Ganeshkhind, Pune 411007, India., Lahiri S; Department of Physics, Birla Institute of Technology, Mesra, Ranchi, Jharkhand 835215, India. |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | Physical review. E [Phys Rev E] 2020 Mar; Vol. 101 (3-1), pp. 032109. |
| DOI: | 10.1103/PhysRevE.101.032109 |
| Abstrakt: | The topic of microscopic heat engine has undergone intensive research in recent years. Microscopic heat engines can exploit thermal as well as active fluctuations to extract thermodynamic work. We investigate the properties of a microscopic Stirling's engine that uses an active (self-propelling) particle as a working substance, in contact with two thermal baths. It is shown that the presence of activity leads to an enhanced performance of the engine. The efficiency can be improved by increasing the activity strength for all cycle time, including the nonquasistatic regime. We verify that the analytical results agree very well with our simulations. The variation of efficiency with the temperature difference between the two thermal baths has also been explored. The optimum region of operation of the engine has been deduced, by using its efficient power (product of efficiency and power) as a quantifier. Finally, a simple model is provided that emulates the behavior of a flywheel driven by this engine. |
| Databáze: | MEDLINE |
| Externí odkaz: |
|