| Issue |
EPL
Volume 84, Number 4, November 2008
|
|
|---|---|---|
| Article Number | 40009 | |
| Number of page(s) | 5 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/84/40009 | |
| Published online | 13 November 2008 | |
Ratcheting heat flux against a thermal bias
1
Department of Physics and Centre for Computational Science and Engineering, National University of Singapore - Singapore 117542, Republic of Singapore
2
Institut für Physik, Universität Augsburg - Universitätsstr. 1, D-86135 Augsburg, Germany
3
NUS Graduate School for Integrative Sciences and Engineering - Singapore 117597, Republic of Singapore
Corresponding authors: peter.hanggi@physik.uni-augsburg.de phylibw@nus.edu.sg
Received:
14
August
2008
Accepted:
13
October
2008
Merely rocking the temperature in one heat bath can direct a steady heat flux from cold to hot against a (time-averaged) non-zero thermal bias in stylized nonlinear lattice junctions that are sandwiched between two heat baths. Likewise, for an average zero-temperature difference between the two contacts a net, ratchet-like heat flux emerges. Computer simulations show that this very heat flux can be manipulated and even reversed by suitably tailoring the frequency (≲ 100 MHz) of the alternating-temperature field.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 07.20.Pe – Heat engines; heat pumps; heat pipes / 05.90.+m – Other topics in statistical physics, thermodynamics, and nonlinear dynamical systems
© EPLA, 2008
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