3. Convective hot-air drying, by entrainment

3.1 Principles of hot-air drying

The product is characterized by its geometry (characteristic dimension L, exchange surface S for its mass m), by its average water content $\overline{X}$ (kg water/kg DM) and by its temperature θ _P (of which θ _Ps on the surface). It is placed in warm air A characterized by its temperature (θ _a > θ _Ps ), its relative humidity ϕ _a assumed to be low, and its relative velocity...