1. Fluid Mechanics Research Group Two phase modelling for industrial applications Prof A.E.Holdø & R.K.Calay

2. Fluid Mechanics Research Group A case study Multiphase flows Investigation into gravity based oil- water separator Using IPSA model Parametric studies A design tool

3. Fluid Mechanics Research Group A typical separator

4. Fluid Mechanics Research Group Flow mechanisms Liquid/liquid flow Density difference Gravitational force Viscosity difference Viscous shear

5. Fluid Mechanics Research Group CFD Model

6. Fluid Mechanics Research Group Boundary conditions Inlet: water:oil 50:50 Velocity for the mixture =-.25m/s Symmetry boundary conditions along y-z plane at x=0 Outlets: free All other walls as no-slip walls

7. Fluid Mechanics Research Group Mesh models

8. Fluid Mechanics Research Group Comparison of velocity profiles for different mesh models Variation of velocity at outlet2

9. Fluid Mechanics Research Group Variation of oil volume fraction at outlet2

10. Fluid Mechanics Research Group Results: Distribution phase volume fraction at x=0, y-z plane

11. Fluid Mechanics Research Group Velocity contours at y-z mid plane

12. Fluid Mechanics Research Group Velocity-vectors at mid y-z plane

13. Fluid Mechanics Research Group Velocity at various locations along the z-axis

14. Fluid Mechanics Research Group Streamlines

15. Fluid Mechanics Research Group Parametric comparisons

16. Fluid Mechanics Research Group Water volume fraction for particle size;.25mm and 1mm

17. Fluid Mechanics Research Group Different inlet velocity: 0.25m/s ; 0.5m/s

18. Fluid Mechanics Research Group Oil volume fraction 0.25m/s; 0.5m/s

19. Fluid Mechanics Research Group Changing the weir height 0.5m; 0.805m

20. Fluid Mechanics Research Group Conclusions Convergence is difficult compared to single phase Mesh, relaxation factor, initialisation affect the solution Good results for preliminary investigations Data needed for validation

21. Fluid Mechanics Research Group Further Modifications Transient simulation Models for emulsification, coagulation and bubble formation Effect of solid particles