The drying of grain in dryers of a crossflow moving bed type was theoretically and excerimentally studied. Two different duer configurations were analyzed. a drver Gith centrdkr distribution and another wilh multl'ole air ducts. ~xoenmental in~ormallun was obtained in p~lot-size dryers A mathem;ticnl model lo rikulalc llx process was developed Hindered drylng u;l\ accounrerl lor by uslng the conccpl of relative drvine rate.-~n adiustable fact06 s~ecific to the drver8. wasised to account for the un~er(~>nt~es of the>ontacl area nnd'the umsfer c&ffic~ents mcountercd in the literature. Agreement between ex~rimental rcsulls and simul.!lions WL. farly eood. Simulatiins showed that distance between inlet air and outlet devices. air to -solid flow ratlo and dryer height to crurs seclion muo havc great ~nflucnce on the process The mathematicd model may be a uceful tool for process explor~tion and optimization of this type of dryers INTRODUCTION