Drying of food materials like ragi, wheat, rice, seeds is gaining importance in recent years. Many types of driers are available in practice and fluidized bed driers are one among them. It has many advantages like (i) high degree of contact between solids and gases (ii) very high heat and mass transfer rates (iii)better temperature control (iv) absence of moving parts, rotating seals and easy maintenance (v)good mixing over other driers. In the present investigation a continuous drying of food grain - ragi has been studied. The experimental set up consists of a main body, a annular tube fixed...