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Numerical investigation on drag coefficient and flow characteristics of two biomass spherical particles in supercritical water

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  • Jin, Hui
  • Wang, Huibo
  • Wu, Zhenqun
  • Ren, Zhenhua
  • Ou, Zhisong

Abstract

Supercritical water fluidized bed (SCWFB) is a novel reactor which can achieve efficient and clean gasification of biomass. The study of supercritical water (SCW)-solid two-phase flow characteristics in SCWFB is of great significance for biomass conversion and optimization of the reactor. However, the work on the drag coefficient of single biomass particle and biomass particle cluster has limitations to describe the interactions between particles accurately. In this paper, two-particle model was used to study the drag coefficient and flow characteristics of supercritical water flow past biomass particle cluster in the range of 10 < Re < 200. The simulation results show the interactions between particles can transmit larger distances perpendicular to the flow field at low Re. Drag coefficient of particles is mainly affected by the wake zone generated behind the upstream particles and nozzle effect between particles. Nozzle effect which is significant at high Re will promote flow separation and make form drag and friction drag increase. And the wake zone generated behind the upstream particles has the opposite effect.

Suggested Citation

  • Jin, Hui & Wang, Huibo & Wu, Zhenqun & Ren, Zhenhua & Ou, Zhisong, 2019. "Numerical investigation on drag coefficient and flow characteristics of two biomass spherical particles in supercritical water," Renewable Energy, Elsevier, vol. 138(C), pages 11-17.
    • Handle: RePEc:eee:renene:v:138:y:2019:i:c:p:11-17
    DOI: 10.1016/j.renene.2019.01.056
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    References listed on IDEAS

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    1. Kumar, Vinod & Nanda, Manisha & Joshi, H.C. & Singh, Ajay & Sharma, Sonal & Verma, Monu, 2018. "Production of biodiesel and bioethanol using algal biomass harvested from fresh water river," Renewable Energy, Elsevier, vol. 116(PA), pages 606-612.
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    Cited by:

    1. Wu, Zhenqun & Ou, Guobiao & Ren, Yifei & Jin, Hui & Guo, Liejin, 2020. "Particle-resolved numerical study of the forced convection heat transfer characteristics of an endothermic-biomass particle placed in supercritical water crossflow," Renewable Energy, Elsevier, vol. 158(C), pages 271-279.
    2. Hosseinzadeh, Saman & Fattahi, Abolfazl & Sadeghi, Sadegh & Rahmani, Ebrahim & Bidabadi, Mehdi & Zarei, Fatemeh & Xu, Fei, 2020. "Mathematical analysis of steady-state non-premixed multi-zone combustion of porous biomass particles under counter-flow configuration," Renewable Energy, Elsevier, vol. 159(C), pages 705-725.
    3. Farahani, Moein Farmahini & Akbari, Shahin & Sadeghi, Sadegh & Bidabadi, Mehdi & Moghadam, Mohammadamir Ghasemian & Xu, Fei, 2020. "Analytical study of transient counter-flow non-premixed combustion of biomass in presence of thermal radiation," Renewable Energy, Elsevier, vol. 159(C), pages 312-325.
    4. Liu, Xiangyang & Wang, Tao & Chu, Jianchun & He, Maogang & Li, Qibin & Zhang, Ying, 2020. "Understanding lignin gasification in supercritical water using reactive molecular dynamics simulations," Renewable Energy, Elsevier, vol. 161(C), pages 858-866.
    5. Wang, Cui & Jin, Hui & Peng, Pai & Chen, Jia, 2019. "Thermodynamics and LCA analysis of biomass supercritical water gasification system using external recycle of liquid residual," Renewable Energy, Elsevier, vol. 141(C), pages 1117-1126.

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