Skip to Main content Skip to Navigation
Journal articles

Gas-solid fluidized bed simulations using the filtered approach: Validation against pilot-scale experiments

Abstract : The numerical simulations on the large-scale fluidized beds still remain challenging due to the computational limitation and experimental validation. In the present work, a CFD study of a large-scale fluidized bed is investigated using the NEPTUNE_CFD code based on an Eulerian n-fluid modeling approach. A SubGrid Scale (SGS) drag model based on the filtered approach is used to take into account the effect of very small solid structures unresolved with the coarse mesh. The numerical results are compared with the experimental data carried out in a pilot-scale fluidized bed unit and provided by Particulate Solid Research Inc (PSRI). By applying the SGS drag model without any specific or empirical tuning, mesh-independent numerical results are obtained. The flow regimes inside the fluidized bed are well predicted for all the superficial gas velocities studied here. The bed density profiles and the solid entrainment fluxes are also in good agreement with the experimental measurement.  The large-scale fluidized bed simulations are validated against PSRI experiments for different flow regimes from turbulent to fast fluidization.  A SGS drag model based on the filtered approach is using without any specific or empirical tuning which shows certain universality.  The gas-solid flows inside the fluidized bed with different gas velocities are characterized.  The validation in this study is a critical step toward industrial-scale fluidized bed simulations. Gas-solid fluidized bed simulations using the filtered approach: Validation against pilot-scale experiments Abstract The numerical simulations on the large-scale fluidized beds still remain challenging due to the computational limitation and experimental validation. In the present work, a CFD study of a large-scale fluidized bed is investigated using the NEPTUNE CFD code based on an Eulerian n-fluid modeling approach. A SubGrid Scale (SGS) drag model based on the filtered approach is used to take into account the effect of very small solid structures unresolved with the coarse mesh. The numerical results are compared with the experimental data carried out in a pilot-scale fluidized bed unit and provided by Particulate Solid Research Inc (PSRI). By applying the SGS drag model without any specific or empirical tuning, mesh-independent numerical results are obtained. The flow regimes inside the fluidized bed are well predicted for all the superficial gas velocities studied here. The bed density profiles and the solid entrainment fluxes are also in good agreement with the experimental measurement.
Complete list of metadatas

Cited literature [29 references]  Display  Hide  Download

https://hal-ifp.archives-ouvertes.fr/hal-02502908
Contributor : Catherine Belli <>
Submitted on : Monday, March 9, 2020 - 3:58:35 PM
Last modification on : Tuesday, November 17, 2020 - 9:56:05 AM
Long-term archiving on: : Wednesday, June 10, 2020 - 3:50:38 PM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2022-01-07

Please log in to resquest access to the document

Identifiers

Collections

Citation

Wenchao Yu, Pascal Fede, Mahdi Yazdanpanah, Benjamin Amblard, Florian Euzenat, et al.. Gas-solid fluidized bed simulations using the filtered approach: Validation against pilot-scale experiments. Chemical Engineering Science, Elsevier, 2020, 217, pp.115472. ⟨10.1016/j.ces.2020.115472⟩. ⟨hal-02502908⟩

Share

Metrics

Record views

131