In this paper, we report an experimental study on an empty dryer. The device
under is an indirect dryer electrically heated. The focus is made on the thermal
and fluid behavior in such systems without considering the drying process. Thus,
the temperature and fluid velocity profiles are presented in order to determine the
fluid flow and the thermal profiles inside the different parts of the dryer in the
situations of natural and mixed convection in order to describe and allow a better
comprehension of the heat and fluid flow patterns inside a dryer. The enthalpy
balances lead to the determination of the most efficient zone in the dryer, this
latter is located at 2/3 of its length.