Assignment:
A thin plate of solid salt, NaC1, measuring 15 by 15 cm, is to be dragged through seawater at a velocity of 0.6 ds. The 291 K seawater has a salt concentration of 0.0309 g/cm3 and a density of 1.022 g/cm3. Estimate the rate at which the salt goes into solution if the edge effects can be ignored. Assume that the kinematic viscosity at the average liquid film conditions is 1.02 x 10-6 m2/s, and the diffusivity is 1.25 x 10-9m2/s. The solubility of NaCl in water at 291 K is 0.35 g/cm3, and the density of the saturated solution is 1.22 g/cm3 (Perry and Chilton, 1973).
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