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Numerical simulation of a cubic spout-fluid bed: influences of inlet gas temperature and jet to bed cross-section ratio

Rahmani, A ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1515/ijcre-2019-0144
  3. Publisher: De Gruyter , 2020
  4. Abstract:
  5. In this paper, we study the role of inlet gas temperature and jet to bed cross-section ratio on hydrodynamics and circulation patterns of particles in a spout-fluid bed. The system is modeled using CFD-TFM approach based on Eulerian-Eulerian method. Simulation results are validated by experimental data measured by (Link 2008. "PEPT and Discrete Particle Simulation Study of Spout-fluid Bed Regimes." Aiche Journal 54 (5): 1189-202). First, the sensitivity analysis of simulation results versus the most significant parameters are conducted to find the optimum values for each parameter. Subsequently, the role of inlet gas temperature and cross-section ratios are studied in detail. The simulation results clearly demonstrate that increasing the inlet gas temperature raises particles' velocity in the bed and affects the circulation pattern in annulus region. Additionally, it is shown that higher gas temperature leads to existence of hot spots in the annulus region. In case of jet to bed cross-section ratio, using larger ratios results in higher velocities and lower pressure drop along the bed. © 2020 Walter de Gruyter GmbH, Berlin/Boston 2020
  6. Keywords:
  7. inlet gas temperature ; jet to bed cross-section ratio ; spout-fluid bed ; Computational fluid dynamics ; Polypropylenes ; Sensitivity analysis ; Analysis of simulations ; Circulation patterns ; Discrete particle simulation ; Eulerian-Eulerian ; Higher gas temperature ; Inlet gas temperature ; Lower pressures ; Spout fluid beds ; Gases
  8. Source: International Journal of Chemical Reactor Engineering ; Volume 18, Issue 3 , 2020
  9. URL: https://www.degruyter.com/document/doi/10.1515/ijcre-2019-0144/html