Thermal Conductivities of He, Ne, Ar, and of their Mixtures

摘要

The use of a line‐source transient‐heat‐transfer technique to determine the thermal conductivities of He, Ne, Ar, and of their mixtures is reported along with results. The method employs existing rigorous analytical theory for a finite line source possessing heat capacity. The experimental and analytical techniques minimize the effects of instrument size, radiation, free convection, and thermal separation of the mixtures. The linesource diameter was 0.00763 cm with a central 0.00203‐cm nickel temperature sensing coil to provide temperature data. Experimental times of 270 msec or less and total temperature rises of less than 10°C were used to minimize radiation, free convection, and thermal separation effects. The data show excellent agreement with existing data and an internal consistency and accuracy believed to demonstrate elimination of undesirable effects upon over‐all thermal‐conductivity determinations.