Related Experiment Video
Updated: Apr 3, 2026

Continuously-stirred Anaerobic Digester to Convert Organic Wastes into Biogas: System Setup and Basic Operation
Published on: July 13, 2012
Euler-Lagrange CFD modelling of unconfined gas mixing in anaerobic digestion
Davide Dapelo1, Federico Alberini2, John Bridgeman1
1University of Birmingham, School of Civil Engineering, Birmingham B15 2TT, United Kingdom.
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.
Related Concept Videos
Bioreactor Controls-II
Turbulent Flow: Problem Solving
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures enhance...
Eulerian and Lagrangian Flow Descriptions
The Eulerian method focuses on fixed points in space where fluid properties, such as velocity, pressure, and temperature, are observed as the fluid moves between these...
Gas Exchange and Transport
The Thermodynamics of Mixing

