Convective drying of nonporous biological solids a 3 mm bed of wet nonporous biological solids was dried in a tray by blowing air with 20% moisture across the top of the bed at 70°c and atmospheric pressure. the data in table p10.5 were obtained for the drying of these solids: table p10.5 xn mass water mass dry solids t (min) 20 30 40 50 60 70 80 90 100 120 140 160 0.190 0.176 0.153 0.130 0.107 0.084 0.064 0.050 0.039 0.031 0.026 0.018 0.014 0.012 from the drying data, estimate the diffusion coeffi cient of water in the biological material and the heat transfer coefficient for the convective heat transfer. the wet material has a bulk density of 1.1 g/cm