Numerical simulation of bubble and particles motions in a bubbling fluidized bed using direct simulation Monte-Carlo method
2006; Elsevier BV; Volume: 169; Issue: 3 Linguagem: Inglês
10.1016/j.powtec.2006.08.013
ISSN1873-328X
AutoresHuilin Lu, Zhiheng Shen, Jianmin Ding, Xiang Li, Huanpeng Liu,
Tópico(s)Cyclone Separators and Fluid Dynamics
ResumoFlow behavior of bubbles and particles in a bubbling fluidized bed were numerically computed using Euler–Lagrange approach. Particle collision was simulated by means of the direct simulation Monte-Carlo (DSMC) method and hard-sphere model. The computed velocities and fluctuations of particles were in agreement with experimental data of Yuu et al. [S. Yuu, H. Nishikawa, T. Umekage, Numerical simulation of air and particle motions in group-B particle turbulent fluidized bed, Powder Technol. 118 (2001) 32–44]. The distributions of velocity, concentration, granular temperature and collision frequency of particles in a bubbling fluidized bed were analyzed. The wavelet multi-resolution analysis was used to investigate flow behavior of bubbles and particles. The bubble frequency of random-like bubble fluctuation was determined from the wavelet multi-resolution analysis over a time–frequency plane.
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