Abstract 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.

中文翻译：

---

立方喷口流化床的数值模拟：入口气体温度和射流与床横截面比的影响

摘要 在本文中，我们研究了入口气体温度和射流与床的横截面比对喷口流化床中颗粒的流体动力学和循环模式的作用。该系统使用基于 Eulerian-Eulerian 方法的 CFD-TFM 方法进行建模。模拟结果通过 (Link 2008. “PEPT and Discrete Particle Simulation Study of Spout-fluid Bed Regimes.” Aiche Journal 54 (5): 1189–202) 测量的实验数据进行验证。首先，对仿真结果与最重要参数进行敏感性分析，以找到每个参数的最佳值。随后，详细研究了入口气体温度和横截面比的作用。模拟结果清楚地表明，增加入口气体温度会提高床中颗粒的速度并影响环空区域的循环模式。此外，还表明较高的气体温度会导致环空区域存在热点。在射流与床横截面比的情况下，使用更大的比率会导致更高的速度和更低的沿床压降。