Metastable Lennard-Jones fluids. II. Thermal conductivity
Journal of Chemical Physics, ISSN: 0021-9606, Vol: 140, Issue: 21, Page: 214506
2014
- 19Citations
- 20Captures
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Metrics Details
- Citations19
- Citation Indexes19
- 19
- CrossRef14
- Captures20
- Readers20
- 20
Article Description
The method of equilibrium molecular dynamics with the use of the Green-Kubo formalism has been used to calculate the thermal conductivity λ in stable and metastable regions of a Lennard-Jones fluid. Calculations have been made in the range of reduced temperatures 0.4 ≤ T* = k T/ε ≤ 2.0 and densities 0.01 ≤ ρ* = ρσ ≤ 1.2 on 15 isotherms for 234 states, 130 of which refer to metastable regions: superheated and supercooled liquids, supersaturated vapor. Equations have been built up which describe the dependence of the regular part of the thermal conductivity on temperature and density, and also on temperature and pressure. It has been found that in (p, T) variables in the region of a liquid-gas phase transition a family of lines of constant value of excess thermal conductivity Δλ = λ - λ, where λ is the thermal conductivity of a dilute gas, has an envelope which coincides with the spinodal. Thus, at the approach to the spinodal of a superheated liquid and supersaturated vapor (∂Δλ /∂p) → ∞, (∂Δλ/∂T) → ∞. © 2014 AIP Publishing LLC.
Bibliographic Details
AIP Publishing
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