### Abstract

Based on the Eulerian–Eulerian two-fluid continuum approach, an improved
unified second-order-moment two-phase turbulence model combining with
the kinetic theory of particle collision frictional stress model is
developed to simulate the dense gas–particle flows in downer, where the
effective coefficient of restitution is incorporated into the
particle–particle collision. The interaction term between gas and
particle turbulence is fully taken into account by the transport
equation of two-phase stress correlation. Hydrodynamics of high density
particle flow, measured by Wang et al. [27]
are predicted and the simulated results are in good agreement with
experimental data. On the conditions of considering the realistic energy
dissipation due to frictional stress, particle concentration and
particle axial averaged velocity are closely the measured and they are
better than without frictional stress model. Furthermore, the particle
Reynolds stress is redistributed and the particle temperature is
reduced. Effect of frictional stress leads to increase obviously the
collision frequency at the outlet and inlet regions and the magnitude of
frequency of particle collisions is 10

^{2}.Original language | English |
---|---|

Pages (from-to) | 504-511 |

Number of pages | 8 |

Journal | Advanced Powder Technology |

Volume | 22 |

Issue number | 4 |

DOIs | |

Publication status | Published - 2011 |

MoE publication type | A1 Journal article-refereed |

Event | Chemeca 2010 - Adelaide, Australia Duration: 26 Sep 2010 → 29 Sep 2010 |

### Keywords

- Dense gas-particle two-phase turbulence
- downer
- frictional stress
- hydrodynamics simulation
- unified second-order-moment model

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## Cite this

Liu, Y., Liu, X., Kallio, S., & Zhou, L. (2011). Hydrodynamic predictions of dense gas-particle flows using a second-order-moment frictional stress model.

*Advanced Powder Technology*,*22*(4), 504-511. https://doi.org/10.1016/j.apt.2010.07.003