Abstract
This paper reports thermal conductivity data for methane measured in the temperature range 120–400 K and pressure range 25–700 bar with a maximum uncertainty of ± 1%. A simple correlation of these data accurate to within about 3% is obtained and used to prepare a table of recommended values.
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Abbreviations
- a k ,b ij ,b k :
-
Parameters of the regression model, k= 0 to n; i =0 to m; j =0 to n
- P :
-
Pressure (MPa or bar)
- Q kl :
-
Heat flux per unit length (mW · m−1)
- t :
-
time (s)
- T :
-
Temperature (K)
- T cr :
-
Critical temperature (K)
- T r :
-
reduced temperature (= T/T cr)
- ΔT w :
-
Temperature rise of wire between times t 1 and t 2 (deg K)
- ΔT * :
-
Reduced temperature difference (TśT cr)/T cr
- λ:
-
Thermal conductivity (mW · m−1 · K−1)
- λ1 :
-
Thermal conductivity at 1 bar (mW · m−1 · K−1)
- λbg :
-
Background thermal conductivity (mW · m−1 · K−1)
- Δλcr :
-
Anomalous thermal conductivity (mW · m−1 · K−1)
- Δλe :
-
Excess thermal conductivity (mW · m−1 · K−1)
- ρ :
-
Density (g · cm−3)
- ρ cr :
-
Critical density (g · cm−3)
- ρ r :
-
Reduced density (= ρ/ρ cr)
- Δρ * :
-
Reduced density difference (ρ−ρ cr )/ρ cr
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Prasad, R.C., Mani, N. & Venart, J.E.S. Thermal conductivity of methane. Int J Thermophys 5, 265–279 (1984). https://doi.org/10.1007/BF00507836
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DOI: https://doi.org/10.1007/BF00507836