Heat controlling in the mass-graded harmonic lattices with double-well on-site potential
2018 ◽
Vol 32
(20)
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pp. 1850217
Keyword(s):
New Type
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Using nonequilibrium molecular dynamics simulations, we investigate thermal rectification in mass-graded lattices with a new type on-site potential which has a physical picture of the double-well. By adjusting the ratio of harmonic on-site potential and anharmonic on-site potential, we could obtain the optimal heat transport and the best thermal rectification. In addition, we observe the reversal thermal rectification by changing the ratio of on-site potential and analyzes the mechanism of thermal rectification through the power spectrum. At last, we also study the heat flux and thermal rectification in a different case of average temperature and mass gradient.
2016 ◽
Vol 18
(20)
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pp. 13741-13745
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2009 ◽
Vol 130
(8)
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pp. 084904
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2016 ◽
Vol 18
(2)
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pp. 1202-1211
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2017 ◽
Vol 53
(2)
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pp. 1310-1317
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