CFD Modelling for Process Design and Optimisation

Dr Graeme Lane

Fluid flow with Lightnin A310 impeller

Visualising the trailing vortices (large eddy simulation)

Flow separation over an impeller blade

Swirling flow in crystalliser for scale suppression

Trailing vortex behind blade of a Rushton turbine

Mechanical agitation with Rushton turbine

Flow velocity vectors in vertical plane

Liquid phase flow velocity vectors

Gas dispersion with Lightning A315 impeller

Gas phase volume fraction

Gas sparger

Horizontal autoclave for pressure acid leaching

Flow velocity vectors

Turbulent kinetic energy

Mixer box for solvent extraction

Organic inlet

Aqueous inlet

Pump-mixer impeller

Overflow to settler

Flow pattern and distribution of local droplet size

Mixer box for solvent extraction

Symmetry plane

Inlet from mixer

section

Aqueous underflow

Organic overflow

Gravity settler for solvent extraction plant

Picket fences are installed to control flow distribution

Streamlines for organic phase Streamlines for aqueous phase

Solvent extraction settler – flow patterns

2nd fence1st fence

Solvent extraction settler – multiphase modelling

Inlet To overflow and underflow outlets

Organic phase volume fraction

Organic phase droplet size

Static mixer insert in reactor tube (Kenics mixer)

Tracer particle paths

Mixing with Kenics static mixer

Tracer patterns indicate how mixing efficiency is affected by flow velocity in tube

Flow past an open butterfly valve

Paths of suspended particles Erosion rate calculated from particle collision frequency