607.    COLBURN, A. P., DREW, T. B., AND WORTHINGTON, H.  Heat Transfer in a 3:1 Hydrogen-Nitrogen Mixture at High Pressures.   Ind. Eng. Chem., vol. 39, 1947, pp. 958-964.

      Experiments were conducted for flow inside a 5-ft. length of 5/I-in.-inside diameter steel tubing heated by steam, at gas pressures of 30-900 atm.  The Reynolds numbers extend from 40,000 to the unusually high value of 440,000.  The results are in good agreement with the usual relations for heat transfer.  In the correlations the effects of pressure on the relevant properties of the mixture are taken into account.  Methods of estimating these effects, which were not pronounced over the pressure range studied, are presented.  Concurrence of the data with those for better known gases is shown by inclusion of experimental data for air at 5-8 atm. and at Reynolds numbers from 9,000-50,000.

     COLE, W. A.  See abs. 178a.