Effect of solid mass flux on anisotropic gas–solid flow in risers determined with an LES-SOM model--颗粒学报PARTICUOLOGY

Chen, J., Meng, C., Wang, S., Yu, G., Hu, T., & Lin, F. (2017). Effect of solid mass flux on anisotropic gas–solid flow in risers determined with an LES-SOM model. Particuology, 34, 70-80. https://doi.org/10.1016/j.partic.2016.12.003

Effect of solid mass flux on anisotropic gas–solid flow in risers determined with an LES-SOM model

Juhui Chen ^{a b *}, Cheng Meng ^a, Shuai Wang ^c *, Guangbin Yu^a, Ting Hu ^b, Feng Lin^b

a School of Mechanical Engineering, Harbin University of Science and Technology, Harbin 150080, China
b No. 703 Research Institute of China Shipbuilding Industry Corporation, Harbin 150001, China
c School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

10.1016/j.partic.2016.12.003

Volume 34, October 2017, Pages 70-80

Received 26 August 2016, Revised 24 November 2016, Accepted 5 December 2016, Available online 22 April 2017, Version of Record 12 August 2017.

E-mail: chenjuhui@hit.edu.cn; shuaiwang@hit.edu.cn

Highlights

• The SGS-TKE model under the framework of LES-SOM approach was derived.

• The anisotropic characteristics of particles in the circulating fluidized bed were predicted.

• The second-order moment of particles and the SGS turbulent kinetic energy of gas were analyzed.

• The effects of solid mass flux on the anisotropic characteristics of particles were summarized.

Abstract

Within the framework of the two-fluid approach, gas was treated with a large-eddy simulation and a sub-grid-scale (SGS) turbulent kinetic energy model while particles were treated with a second-order-moment method to describe the anisotropy of the fluctuating velocity. A modified Simonin model was derived for the gas–solid interphase fluctuating energy transfer. The anisotropic gas–solid flow in a circulating fluidized bed was investigated. Predictions were in good agreement with experimental data. The distributions of the second-order moment of particles and SGS-turbulent kinetic energy of gas were simulated at different solid mass fluxes. The effects of the solid mass flux on the particle second-order moment, particle anisotropic behavior, gas SGS-turbulent kinetic energy and gas SGS energy dissipation were analyzed for the circulating fluidized bed.

Graphical abstract

Keywords

Large-eddy simulation; Sub-grid scale turbulent kinetic energy model; Second-order moment model; Anisotropic gas–solid flow; Circulating fluidized bed

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