Hydrodynamic predictions of dense gas-particle flows using a second-order-moment frictional stress model

Y. Liu (Corresponding Author), X. Liu, Sirpa Kallio, L. Zhou

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)

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 102.
Original languageEnglish
Pages (from-to)504-511
Number of pages8
JournalAdvanced Powder Technology
Volume22
Issue number4
DOIs
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed
EventChemeca 2010 - Adelaide, Australia
Duration: 26 Sep 201029 Sep 2010

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Hydrodynamics
Gases
Kinetic theory
Turbulence models
Energy dissipation
Turbulence
Fluids
Temperature

Keywords

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

Cite this

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title = "Hydrodynamic predictions of dense gas-particle flows using a second-order-moment frictional stress model",
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 102.",
keywords = "Dense gas-particle two-phase turbulence, downer, frictional stress, hydrodynamics simulation, unified second-order-moment model",
author = "Y. Liu and X. Liu and Sirpa Kallio and L. Zhou",
year = "2011",
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language = "English",
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pages = "504--511",
journal = "Advanced Powder Technology",
issn = "0921-8831",
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}

Hydrodynamic predictions of dense gas-particle flows using a second-order-moment frictional stress model. / Liu, Y. (Corresponding Author); Liu, X.; Kallio, Sirpa; Zhou, L.

In: Advanced Powder Technology, Vol. 22, No. 4, 2011, p. 504-511.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Hydrodynamic predictions of dense gas-particle flows using a second-order-moment frictional stress model

AU - Liu, Y.

AU - Liu, X.

AU - Kallio, Sirpa

AU - Zhou, L.

PY - 2011

Y1 - 2011

N2 - 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 102.

AB - 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 102.

KW - Dense gas-particle two-phase turbulence

KW - downer

KW - frictional stress

KW - hydrodynamics simulation

KW - unified second-order-moment model

U2 - 10.1016/j.apt.2010.07.003

DO - 10.1016/j.apt.2010.07.003

M3 - Article

VL - 22

SP - 504

EP - 511

JO - Advanced Powder Technology

JF - Advanced Powder Technology

SN - 0921-8831

IS - 4

ER -