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阻尼作用下一维体系热传导性质的研究
引用本文:李新霞,唐翌.阻尼作用下一维体系热传导性质的研究[J].物理学报,2006,55(12):6556-6561.
作者姓名:李新霞  唐翌
作者单位:湘潭大学现代物理研究所,湘潭 411105
基金项目:湖南省杰出青年科学基金
摘    要:利用分子动力学方法,研究了阻尼对一维体系热传导性质的影响.研究结果表明,当体系的可积性因阻尼的引入而被破坏时,在一维谐振子晶格体系中也能够形成线性的温度分布.弱阻尼对非可积体系的温度分布和热导率的影响是一种微扰,而对于可积体系是一种性态的改变.在强阻尼条件下,由于体系能量的过度耗散,体系中呈现出凹形的温度分布和收敛的热导率. 关键词: 非线性动力学 一维体系 能量传输 阻尼

关 键 词:非线性动力学  一维体系  能量传输  阻尼
文章编号:1000-3290/2006/55(12)/6556-06
收稿时间:11 24 2005 12:00AM
修稿时间:2005-11-242006-07-18

Heat conduction in one-dimensional systems with damping
Li Xin-Xia,Tang Yi.Heat conduction in one-dimensional systems with damping[J].Acta Physica Sinica,2006,55(12):6556-6561.
Authors:Li Xin-Xia  Tang Yi
Institution:Institute of Modern Physics, Xiangtan University, Xiangtan 411105, China
Abstract:By making use of the method of molecular dynamics, we study the behaviors of heat conduction in one-dimensional systems under the influence of damping. The results show that when the integrability of the systems is destroyed by the damping, linear temperature profiles appear even in the harmonic lattices. Weak damping acts as a sort of perturbation in nonintegable systems and does not substantially change their temperature profiles and the thermal conductivity, while it causes essential change in integrable systems. However, in the case of strong damping, because of the excessive dissipation of energy, temperature profiles in a sunken shape and the convergent thermal conductivity appear.
Keywords:nonlinear dynamics  one-dimensional systems  energy transport  damping
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