title: Euler-Lagrange CFD modelling of unconfined gas mixing in anaerobic digestion.
abstract: A novel Euler-Lagrangian (EL) computational fluid dynamics (CFD) finite volume-based model to simulate the gas mixing of sludge for anaerobic digestion is developed and described. Fluid motion is driven by momentum transfer from bubbles to liquid. Model validation is undertaken by assessing the flow field in a labscale model with particle image velocimetry (PIV). Conclusions are drawn about the upscaling and applicability of the model to full-scale problems, and recommendations are given for optimum application.
authors.affiliation: University of Birmingham, School of Civil Engineering, Birmingham B15 2TT, United Kingdom. Electronic address: dxd265@bham.ac.uk.
authors.forename: Davide
authors.initials: D
authors.lastname: Dapelo
authors.affiliation: University of Birmingham, School of Chemical Engineering, United Kingdom.
authors.forename: Federico
authors.initials: F
authors.lastname: Alberini
authors.affiliation: University of Birmingham, School of Civil Engineering, Birmingham B15 2TT, United Kingdom.
authors.forename: John
authors.initials: J
authors.lastname: Bridgeman
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D005740:Gases; D057446:Hydrodynamics; D008962:Models, Theoretical; D012212:Rheology / Q000379:methods*
chemical_list: D005740:Gases
keywords: Anaerobic digestion; CFD; Euler–Lagrangian; Gas mixing; Non-Newtonian fluid; PIV