ANALYSIS OF TRANSPORT PHENOMENA DURING THE CONVECTIVE DRYING IN SUPERHEATED STEAM |
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Authors: | F TOPIN L TADRIST |
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Affiliation: | I.U.S.T.I., CNRS UMR 139, Université de Provence, Centre de St Jér?me , Av. Escadrille Normandie Niemen, Marseille Cedex 20, 13397 Phone: Tel: (33) 04 91 10 68 92 E-mail: E-Mail: fred@iusti.univ-mrs.fr |
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Abstract: | Abstract This work focused on high-temperature convective drying (superheated steam drying). The process has been investigated both experimentally and numerically. The experimental analysis was carried out in an aerodynamic return-flow wind-tunnel, with very small cylinders of cellular concrete. For the local analysis, the samples were fitted with thermocouples and pressure sensors. The mean moisture content of the cylinders was measured by simple weighing while the temperature and pressure readings were being taken. Global and. local analysis of heat and mass transfer in small cylinders in superheated steam were carried out. The systematical study for several sizes and aerothermal conditions show a similar behavior for moisture content, pressure and temperature values. A numerical model for high temperature drying, using the finite elements method, in a 2-D configuration, was implemented and validated. |
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Keywords: | Capillary porous media superheated steam local analysis Dring curves Temperature and pressure fields 2-D Simulations |
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