1. Anaerobic Biogas Digester Modelling Using OpenFOAM and Fluent Andrew Coughtrie Civil Engineering

2. Biogas Digestion?

3. Problem Definition Waste Treatment Mixing effectiveness Failure when scaled up Difficult to monitor experimentally * Karim k. et al. [2007] Gas-lift Digester Configuration Effects on Mixing Effectiveness Experimental bench scale internal airlift loop biogas digester.*

4. CFD Structured square mesh Ansys Meshing and BlockMesh Approximation for inlet boundary Inlet Slurry Surface Outlet Walls

5. Problem Setup Inlet boundary condition based on approximation of flow velocity RNG k-epsilon turbulence model Zero shear wall at surface

6. OpenFOAM Control Function to monitor velocity Discretisation Schemes Linear solver

7. Fluent Wall Treatment Standard Wall Functions Scalable Wall Functions Enhanced Wall Treatment

8. Fluent vs. OpenFOAM OpenFOAMFluent *Karim k. et al. [2004] Flow Pattern Visualization of a Simulated Digester

9. OpenFOAM Fluent Experimental*

10. Single-phase vs. Multiphase DPMSingle-Phase

11. Ongoing Work Non-Newtonian fluid modelling Comparison between single and multiphase for OpenFOAM and Fluent Multiphase 3D modelling Euler-Euler Multiphase using OpenFOAM

12. Three-Dimensional Full 3D geometry for DPM Import mesh to OpenFOAM for use with bubbleFoam

13. ? Questions?