Study on the applicability of two numerical models for simulation of infrared turbulent spouted bed

Abstract

Objective： This study aimed to obtain suitable turbulence model for simulation infrared combined spouted bed numerical valued. Methods: Two equation models (SST k-ε and Realizable k-ε) were used for numerical simulation to obtain the performance parameters of the infrared spouted bed and the velocity, temperature and particle concentration distribution of the flow field in the drying chamber under different working conditions. The particle drying experiment of the infrared spouted bed was carried out. Results: When under the working conditions of air inlet velocity of infrared spouted bed drying chamber of 8 m/s and a temperature of 50 ℃, the values obtained by Realizable k-ε simulation are similar to those obtained by SST k-ε. The particle volume fraction distribution, velocity distribution and temperature distribution in the fluid domain of the drying chamber obtained by numerical simulation with the two turbulence models were similar, and the overall effect is good, which showed that the application of the two turbulence models to the equipment is feasible. The turbulence model of Realizable k-ε converged faster, but the stability of SST k-ε was better. Conclusion: The Realizable k-ε turbulence model is more reasonable to describe three-dimensional flow field of infrared spouted bed.

Keywords

• infrared spouted bed
• dry
• turbulence model
• hydrodynamic performance
• flow field characteristics
• numerical simulation