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- W2548584564 abstract "Abstract A parallel simulation of the gas-solid motions in a 3-D full-loop dual-side refeed circulating fluidized bed (DRCFB) is carried out by using Large-eddy Simulation coupled with Discrete Element Method (LES-DEM), in which the gas and the solid motions are solved under the Eulerian and the Lagrangian frames, respectively. The start-up flow patterns, the time-related solid phase properties about solid cycle time and solid residence time (SRT) distributions, and the improvements of gas-solid flow uniformity are explored. Furthermore, the influences of different operating conditions on the time-related solid phase properties are discussed. The results demonstrate that the transient pressure drop is a criterion for determining steady state in the start-up process and the fluctuations under different superficial velocities differ. The solid cycle time and the SRT distribution curves show a feature of early peak with an extended tail, which indicates that the solid flow exhibits a back-mixing phenomenon. The averaged solid cycle time in the whole system and the averaged SRTs in the three components ( i.e. , riser, cyclone, and dipleg) show distinct characteristics under different operating conditions. Moreover, nearly 70% of the solid cycle time elapses in the riser and 25% of that elapses in the dipleg while only 5% of that elapses in the cyclone. Finally, the dual-side refeed structure remarkably improve the gas-solid flow uniformity ( i.e. , homogenous) in the DRCFB riser, especially in the inlet and outlet regions." @default.
- W2548584564 created "2016-11-11" @default.
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- W2548584564 date "2017-04-01" @default.
- W2548584564 modified "2023-10-14" @default.
- W2548584564 title "LES-DEM investigation of the time-related solid phase properties and improvements of flow uniformity in a dual-side refeed CFB" @default.
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- W2548584564 doi "https://doi.org/10.1016/j.cej.2016.10.130" @default.
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