A thin vessel of length L and cross-section S contains dry air isolated by a flap from air containing saturated water vapor. The bottom temperature of the vessel is maintained at a constant level below 0°C. The flap is removed. Estimate the time it will take for the vessel to establish a steady state of steam. Determine the mass of water frozen per unit time when a steady steam flow is established in the vessel. The diffusion coefficient of saturated steam D, its density ρ.
158