Study on gas–solid two‐phase fluidization and heat transfer in carbon fibre porous media

Abstract In the study, solid phase fluidization in porous media was investigated based on the pore network model method. Micro computed tomography (Micro‐CT) technology was adopted to reconstruct the three‐dimensional structure of porous media. A computational fluid dynamics (CFD) model was established based on the Euler–Euler two‐fluid model, which was verified by experiments. The effect of air inlet velocity and solid content on the solid phase fluidization and heat transfer in porous media was systematically studied. It is found that when the solid content is constant, with the enhancement of solid phase fluidization, the particle velocity and solid concentration standard deviation gradually decreases, and at the same time, when the air inlet velocity is large, the value is small, the bed height increases faster, and the particle temperature decreases more. When the air inlet velocity is constant, the solid velocity gradually decreases and approaches stability with the fluidization process in the flow field with different solid content. At the same time, the higher the solid content, the higher the bed height, the smaller the , and the better the particle distribution uniformity. The research results can assist in the reaction design of multiphase media in porous media reactors, provide good guidance for the uniformity of temperature distribution and the withdrawal of reaction heat in the reactor.