Simulation de l'hydrodynamique et des transferts de matière et de chaleur dans les réacteurs à lit fixe

Abstract : This work deals with modelling and simulation of hydrodynamics, liquid-to-wall mass and heat transfer in fixed bed reactors with both single phase liquid and co-current gas/liquid down flow (trickle-beds). ln modelling, the averiged statistical approach developed by Kashiwa and Rauenzahn (1994) is adopted through the use of the code CFDlib. Different phenomenological relations of fluids/solid and gas/liquid interactions are used to close the process model equations. Simulations of hydrodynamics and liquid-to-wall mass transfer are carried out in trickling and dispersed flow regimes. ln addition to these two regimes, the simulation of induced pulsing flow is investigated. The results are compared to the experimental measurements previously obtained in our laboratory in trickle-bed reactors and to appropriate correlations of literature. Concerning heat transfer, only single phase liquid down flow is considered. The simulation is based on both homogenous and heterogeneous models.
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Farouk Soltana. Simulation de l'hydrodynamique et des transferts de matière et de chaleur dans les réacteurs à lit fixe. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2004. Français. ⟨NNT : 2004INPL069N⟩. ⟨tel-01749817⟩

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