Thermal Transport in One-Dimensional FPU-FK Lattices

Thermal Transport in One-Dimensional FPU-FK Lattices

Thermal transport in the FPU model with Kutta algorithm. The heat flux, local temperature profile, that temperature gradient scales behave as N-1 linearly. FK on-site potential is studied by using fourth-order Runge- and heat conductivity axe simulated and analyzed. It is found The divergence of hea...

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Veröffentlicht in:Communications in theoretical physics 2009-09, Vol.52 (9), p.507-510, Article 507
Hauptverfasser: Yuan, Zhao, Bao-Xue, Xue, Yan-Mei, Wang, Lin, Yi
Format: Artikel
Sprache:eng
Schlagworte:
FPU
单元模型
浮点运算
温度分布
热模拟
热通量
非线性相互作用
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Zusammenfassung:Thermal transport in the FPU model with Kutta algorithm. The heat flux, local temperature profile, that temperature gradient scales behave as N-1 linearly. FK on-site potential is studied by using fourth-order Runge- and heat conductivity axe simulated and analyzed. It is found The divergence of heat conductivity ~ with system size N is in term of κ ∝ N^α with α = 0.44. It is shown that thermal transport is mainly dependent on the FPU nonlinear and the FK interactions.
ISSN:0253-6102
DOI:10.1088/0253-6102/52/3/24