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In this work, a fully three-dimensional (3D) model of combined computational fluid dynamics and discrete element method (CFD–DEM) is for the first time developed to study the gas–solids flow and heat transfer in fluidized beds with an immersed tube. A critical bed thickness is first determined at which the bed can be regarded as fully 3D. Then the validity of the model using the critical bed thickness...
In the previous work, the multi-scale chemical reaction model was developed by Wang et al. (2014) to consider the impact of the meso-scale structure on reaction performance. This paper incorporates multi-scale heat transfer to further improve the previous multi-scale chemical reaction model. The temperature field in the cluster phase and the dispersed phase is predicted. A cluster structure-dependent...
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