Thermal Diffusion in the Helium–Argon Gas System

New values of the thermal-diffusion separation efficiencies in the helium–argon binary gas system at normal pressure were predicted by the entropy similarity method. Experimental studies of the thermal-diffusion separation efficiencies and the thermal-diffusion constants over wide ranges of temperature and compositions are few, and the data obtained by different researchers do not overlap; therefore, all the gaps in the array of experimental data on these quantities were filled with the results obtained by the entropy similarity method. The initial experimental data array was approximated by the least-squares method.