Computational fluid dynamics modelling of unconfined gas mixing of wastewater sludge In a full scale anaerobic digester

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In this paper, an Euler-Lagrange model for computational fluid dynamics was used to model a full-scale gas-mixed anaerobic digester. The flow profiles, local values of non-Newtonian viscosity and average shear rate were analysed. Recommendations to enhance the effectiveness of mixing were given. In particular, the gas mixing input power can be reduced without appreciable detrimental effects on the mixing effectiveness.


Original languageEnglish
JournalCivil-Comp Proceedings
Publication statusPublished - 2015


  • Computational fluid dynamics, Energy, Euler-lagrangian, Non-Newtonian fluid, Sludge, Turbulence, Wastewater