The vapour pressure of napthalene at 100°C is 0.02666 bar. Air at 100°C flows over a plate coated with napthalene at a velocity of 6 m/s. The mass diffusivity has a value of 8.258 × 10–6 m2/s. Gas constant for the vapour = 64.91 J/kg K. The free stream air has no trace of napthalene. Determine the diffusion flux.
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