DOI: 10.1016/j.watres.2018.10.077
Scopus记录号: 2-s2.0-85056248636
论文题名: Characterising the two-phase flow and mixing performance in a gas-mixed anaerobic digester: Importance for scaled-up applications
作者: Wei P. ; Mudde R.F. ; Uijttewaal W. ; Spanjers H. ; van Lier J.B. ; de Kreuk M.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 86
结束页码: 97
语种: 英语
英文关键词: Anaerobic digestion
; CFD
; Hydrodynamics
; Mixing
; Two-phase flow
Scopus关键词: Anaerobic digestion
; Computational fluid dynamics
; Gases
; Hydrodynamics
; Laminar flow
; Mixing
; Pulp digesters
; 2d axisymmetric models
; Continuous stirred tank reactor
; Critical assessment
; Euler-Lagrange method
; Laminar flow reactors
; Mixing performance
; Trajectory tracking
; Uncertainty factors
; Two phase flow
; anaerobic digestion
; comparative study
; computational fluid dynamics
; experimental study
; hydrodynamics
; instrumentation
; mixing
; performance assessment
; two phase flow
; anaerobic digestion
; Article
; biomass
; computational fluid dynamics
; flow kinetics
; gas
; hydrodynamics
; laminar flow
; liquid
; physical phase
; prediction
; priority journal
; scale up
; sparging
; validation study
; viscosity
英文摘要: This study aimed to characterise the gas-liquid flow and mixing behaviour in a gas-mixed anaerobic digester by improving phase interaction modelling using Computational Fluid Dynamics (CFD). A 2D axisymmetric model validated with experimental data was set up using an Eulerian-Eulerian method. Uncertainty factors, including bubble size, phase interaction forces and liquid rheology were found to significantly influence the flow field. A more reliable and complete validation was obtained by critical comparison and assessment of the referred experimental data, compared to the models reported in other studies. Additionally, justifiable corrections and predictions in detail were obtained. Mixing was evaluated by trajectory tracking of a large number of particles based on an Euler-Lagrange method. The mixing performance approximated to a laminar-flow reactor (LFR) that distinctly deviated from expected continuous stirred tank reactor (CSTR) design, indicating limited enhancement from the applied gas-sparging strategy in the studied digester. The study shows the importance of a proper phase-interaction description for a reliable hydrodynamic characterisation and mixing evaluation in gas-mixed digesters. Validations, bend to experimental data without a critical assessment, may lead to an inaccurate model for further scaled-up applications. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122165
Appears in Collections: 气候变化事实与影响
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作者单位: Delft University of Technology, Department of Water Management, Stevinweg 1, Delft, CN 2628, Netherlands; Delft University of Technology, Department of Chemical Engineering, van der Maasweg 9, Delft, HZ 2629, Netherlands; Delft University of Technology, Department of Hydraulic Engineering, Stevinweg 1, Delft, CN 2628, Netherlands
Recommended Citation:
Wei P.,Mudde R.F.,Uijttewaal W.,et al. Characterising the two-phase flow and mixing performance in a gas-mixed anaerobic digester: Importance for scaled-up applications[J]. Water Research,2019-01-01