Accurate calculation of diffusion and shear viscosity coefficients for H2H mixtures

Close-coupled scattering calculations of binary diffusion and shear viscosity coefficients have been made for HH2 mixtures. Cross sections obtained from these scattering calculations give directly the binary diffusion coefficient in its lowest kinetic theory approximation. Additional data are required for the calculation of the shear viscosity. Appropriate cross sections for pure H2 have been obtained from experiment, while those for H have been calculated. Binary diffusion and viscosity coefficients have been calculated for HH2 mixtures for the temperature range 40–2200 K. The value DH2H = 2.13 cm2 s−1 obtained at 295 K is in excellent agreement with experiment.