Numerical simulation of gas-particle flow with a second-order moment method in bubbling fluidized beds

作者：Sun Dan; Wang Jianzhi; Lu Huilin^*; Zhao Yunhua; Chen Juhui; Gidaspow Dimitri; Chen Ming

来源：Powder Technology, 2010, 199(3): 213-225.

DOI：10.1016/j.powtec.2010.01.008

• Second-order moment method
• Anisotropic kinetic theory of granular flow
• Reynolds stresses
• Numerical simulation
• Computational fluid dynamics
• Bubbling fluidized bed

Flow behavior of gas and particles is performed by means of gas-solid two-fluid model with the second-order moment model of particles in the bubbling fluidized bed. The distributions of velocity and moments of particles are predicted in the bubbling fluidized beds. Predictions are compared with experimental data measured by Jung et al. (2005) in a bubbling fluidized bed and Patil et al. (2005) experiments in a bubbling fluidized bed with a jet. The simulated second-order moment in the vertical direction is on average 1.5-2.3 times larger than that in the lateral direction in the bubbling fluidized bed (Jung et al., 2005). For a bubbling fluidized bed with a jet, the ratio of normal second-order moment in the vertical direction to in the lateral direction is in the range of 0.5-2.5 (Patil et al., 2005). The bubblelike Reynolds normal stresses per unit bulk density used by Gidaspow et al. (2002) are computed from the simulated hydrodynamic velocities. The simulated bubblelike Reynolds normal stresses in the vertical direction is on average 4.5-6.0 times larger than that in the lateral direction in the bubbling fluidized bed (Jung et al., 2005). The predictions are in agreement with experimental second-order moments measured by Jung et al. (2005) and porosity measured by Patil et al. (2005).

• 出版日期2010-5-15
• 单位哈尔滨工业大学