Heat Transfer to Hydrogen-Nitrogen Mixtures Inside Tubes

This paper gives results of experiments in which data were determined on heat transfer to air, to nitrogen, and to eight mixtures of hydrogen and nitrogen, ranging from 8.85 to 98 per cent hydrogen, flowing inside a steam-jacketed tube, 0.5 in. inside diam and 48.75 in. long. The data were well correlated when plotted as $hCpG(Cpμk)2/3$ versus $DGμ$ with the value of $Cpμk$ ranging from 0.45 to 0.73. The data checked heat-transfer data of Nusselt and showed deviation from friction analogies.