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Three-Dimensional Molecular Dynamics Simulation on Heat Propagation in Liquid Argon |
| GUO Ying-Kui;GUO Zeng-Yuan;LIANG Xin-Gang |
| Department of Engineering Mechanics, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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GUO Ying-Kui, GUO Zeng-Yuan, LIANG Xin-Gang 2001 Chin. Phys. Lett. 18 71-73 |
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Abstract The propagation behaviour of an initial thermal perturbation in liquid argon is simulated by the molecular dynamics method. The 12-6 Lennard--Jones potential and mirror boundary conditions are employed in the 32768-particle three-dimensional simulation. Macroscopic characteristics such as the kinetic temperature, pressure and momentum profiles are monitored during the simulation in order to examine the heat propagation behaviour under a timescale comparable with the relaxation time. The results show that the behaviour is still diffusion-like; no features predicted by the Cattaneo--Vernotte model have been found. The wave-like front of the local temperature may be caused by the adiabatic compression and expansion by the pressure wave generated by the thermal expansion.
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| Keywords:
44.10.+i
02.70.Ns
61.25.Bi
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Published: 01 January 2001
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