The velocity,
concentration and temperature boundary, for the boundary layer
development on a flat plate during connective mass transfer will be
same, if
A solid is being dried in the linear drying rate regime from moisture content X_{o} to X_{F}. The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture X_{o}. The drying time for M = (L_{s}/AR_{c}) is (where, L = total mass of dry solid, A = total surface area for drying R_{c} = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))