Fluid Mechanics Research Group Two phase modelling for industrial applications Prof A.E.Holdø & R.K.Calay
Fluid Mechanics Research Group A case study Multiphase flows Investigation into gravity based oil- water separator Using IPSA model Parametric studies A design tool
Fluid Mechanics Research Group A typical separator
Fluid Mechanics Research Group Flow mechanisms Liquid/liquid flow Density difference Gravitational force Viscosity difference Viscous shear
Fluid Mechanics Research Group CFD Model
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
Fluid Mechanics Research Group Mesh models
Fluid Mechanics Research Group Comparison of velocity profiles for different mesh models Variation of velocity at outlet2
Fluid Mechanics Research Group Variation of oil volume fraction at outlet2
Fluid Mechanics Research Group Results: Distribution phase volume fraction at x=0, y-z plane
Fluid Mechanics Research Group Velocity contours at y-z mid plane
Fluid Mechanics Research Group Velocity-vectors at mid y-z plane
Fluid Mechanics Research Group Velocity at various locations along the z-axis
Fluid Mechanics Research Group Streamlines
Fluid Mechanics Research Group Parametric comparisons
Fluid Mechanics Research Group Water volume fraction for particle size;.25mm and 1mm
Fluid Mechanics Research Group Different inlet velocity: 0.25m/s ; 0.5m/s
Fluid Mechanics Research Group Oil volume fraction 0.25m/s; 0.5m/s
Fluid Mechanics Research Group Changing the weir height 0.5m; 0.805m
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
Fluid Mechanics Research Group Further Modifications Transient simulation Models for emulsification, coagulation and bubble formation Effect of solid particles