| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Thermal Rectification in Graded Nonlinear Transmission Lines |
| XU Wen1, CHEN Wei-Zhong1**, TAO Feng1,2
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1Key Laboratory of Modern Acoustics (Ministry of Education) and Institution of Acoustics, Nanjing University, Nanjing 210093
2School of Electrical Engineering and Information, Anhui University of Technology, Ma'anshan 243002
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| Cite this article: |
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XU Wen, CHEN Wei-Zhong, TAO Feng 2011 Chin. Phys. Lett. 28 124401 |
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Abstract We consider heat conduction in a nonlinear inductance-capacitance (LC) transmission line with an inductance gradient by adding white-noise signals. It is found that the heat flux in the direction of inductance decrease is larger than that in the direction of inductance increase. When the low-inductance end is at higher temperature, the phonon density decreases due to conversion to high-frequency phonons, which can not move to the high-inductance end due to its lower cutoff frequency. However, when the high-inductance end is at higher temperature, the loss of phonon density can be compensated for because some high-frequency phonons can move to the low-inductance end dur to its higher cutoff frequency. This leads to the asymmetry of energy transfer. Discussion shows that this asymmetry exists in a particular range of temperatures, and increases with the increase of the difference between heat baths and the inductance gradient.
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| Keywords:
44.10.+i
05.60.-k
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Received: 13 July 2011
Published: 29 November 2011
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