Modeling of cluster structure-dependent drag with Eulerian approach for circulating fluidized beds

作者：Wang Shuai; Lu Huilin^*; Liu Guodong; Sheng Zhiheng; Xu Pengfei; Gidaspow, Dimitri

来源：Powder Technology, 2011, 208(1): 98-110.

DOI：10.1016/j.powtec.2010.12.007

• Cluster structure-dependent drag coefficient model
• Kinetic theory of granular flow
• Numerical simulation
• Computational fluid dynamics
• Riser

Flow behavior of gas and solids is simulated in combination the gas-solid two-fluid model with a cluster structure-dependent (CSD) drag coefficient model. The dispersed phase is modeled by a Eulerian approach based upon the kinetic theory of granular flow (KTGF) including models for describing the dispersed phase interactions with the continuous phase. The drag forces of gas-solid phases are predicted from the local structure parameters of the dense and dilute phases based on the minimization of the energy consumed by heterogeneous drag. The cluster structure-dependent (CSD) drag coefficients are incorporated into the two-fluid model to simulate flow behavior of gas and particles in a riser. Simulation results indicate that the dynamic formation and dissolution of clusters can be captured with the cluster structure-dependent drag coefficient model. Simulated solid velocity and concentration of particles profiles are in reasonable agreement with experimental results.

• 出版日期2011-3-10
• 单位哈尔滨工业大学