Thermal conductivity of argon in the temperature range 350 to 2500 K

Abstract

The thermal conductivity of argon is determined in the temperature range 350-2500 K in a carefully designed conductivity column and is given by k(T)/(mW m -x K -x) = 5"465 + 0"04729(T/K) -0"1111 x IO-~(T/K) ~ + 0"1599x 10-S(T/K) a within an estimated uncertainty of about + 1"5 per cent. These values, which are derived from heat transfer measurements in the continuum range, are compared with conductivity values obtained from similar data taken in the temperature-jump regime. The k values are also compared with other available conductivity and viscosity data, and with the predictions based on kinetic theory in conjunction with intermolecular potentials, and the principle of corresponding states. These comparisons have led to many interesting conclusions concerning the quality of other experimental data and the appropriateness of different intermolecular potentials. The predictions based on corresponding states appear most reliable.

Acoustic self-oscillation in a spherical microwave plasma

“…The growth and decay timescales are plotted in Figure 2 for Argon with a neutral density of 2.5 × 10 19 /cc in a bulb with a radius of 2 cm, and subjected to 2.45 GHz microwaves with incident powers ranging from 500 W to 2 kW. The electron-neutral collision cross section, a was taken to be 2 × 10 −17 cm 2 , and the thermal diffusivity adapted from [27] was approximately 10 −4 W/m K. With sufficient power applied, the amplification time is shorter than the damping time for a range of temperatures. The increased time constant at low temperatures occurs because the plasma doesn't absorb power at low conductivity as explained in the next section.…”

Catalytic partial oxidation of CH4 over bimetallic Ni‐Re/Al2O3: Kinetic determination for application in microreactor

“…The viscosity, specific heat capacity and thermal conductivity of the various species as a function of temperature were obtained from the literature. [32][33][34][35][36][37]…”

A cavity-receiver containing a tubular absorber for high-temperature thermochemical processing using concentrated solar energy

“…The temperature-dependent thermal conductivity of Ar, k Ar , is taken from Ref. [29]. q conduction is calculated using 1D radial steady-state conduction heat transfer through the insulation.…”