a)Determine the Reynolds, Schmidt, and Sherwood numbers associated with this process. b) What is the film mass-transfer coefficient, ky, (mole fraction based driving force) associated with this process? C) How long will it take for the solvent to completely evaporate from the coating?
A very thin polymeric coating of thickness 0.1mm uniformly coats a rectangular surface. The rectangular surface has a length of 20cm and a width of 10cm.The coating contains a solvent that must be evaporated away from the coating in other to cure the coating. Initially, there is 0.001 mole of solvent per cm3 of coating loaded in the coating. A heated plate just beneath the surface maintains the coating at a uniform temperature of 40oC,and the vapor pressure exerted by the solvent is 0.05atm at 40oC. Air gently flows parallel to the surface at a velocity of 5.0cm/s. The surrounding air at 1.0atm total system pressure and 20oC represents an "infinite sink" for
a)Determine the Reynolds, Schmidt, and Sherwood numbers associated with this process.
b) What is the film mass-transfer coefficient, ky, (mole fraction based driving force) associated with this process?
C) How long will it take for the solvent to completely evaporate from the coating?
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