Modelling of a Heated Gas-solid Fluidised Bed using Eulerian Based Models

ABSTRACT An Eulerian-Eulerian granular model was used to simulate the flow and heat transfer through a heatedgassolid fluidised bed. The primary objective of study determine whether adequately predicts chamber pressure drop, temperature, bed expansion predictions were assessed validated for various flow-regimes, namely fixed-bed, smooth, bubbling fluidisation, maximum fluidisation regimes. This done on an experimental scale heated gas-solid However, results are generalisable beds when is laminar. Numerical models created using Computational Fluid Dynamics (CFD). CFD-model investigated, analysed, compared results. Basic experiments carried out obtain varying hydrodynamic characteristics. showed slight overprediction drop expansion, however, still in close agreement with experiment. In contrast, underprediction temperatures obtained. Based this study, it recommended that Eulerian be predict dynamic behaviour. Before minimum fixed regime, increases no increase height. No visible bubbles present regime. When has been reached, height rises whereas tends constant value. Bubble size increased superficial velocities. speed With velocity, temperature of326.65 K initial heating element of373.15 K. excessive bed, other methods sufficiently incorporate particle-particle interactions bubble-bubble interactions, recommended. investigation should lent relation transfer. Additional keywords: Heated computational fluid dynamics, CFD, Eulerian, granular,