[JalalKh]

I´m simulating a flotation column in a domain with emulsion of liquid water and oil.
The simulation is semi-batch where air flows continuously through a batch layer of water-oil.
Oil concentration inside the column is 500ppm.
The distributor inlet at the bottom of the vessel has only air flowing through it (air volume fraction =1).

This are my setup options:

Steady state Simulation with 10000 iteration.

Basic Settings:

Liquid Water - Continuous Fluid ; oil - Dispersed Fluid with 20 micron diameter ;air- Dispersed Fluid with 1 mm diameter


FLUID MODELS:

Multiphase: Inhomogeneous

Heat Transfer : Isothermal


FLUID SPECIFIC MODELS:

Fluid Buoyancy Model: Density Difference

Turbulence: Liquid Water –shear stress transport; kerosene - Dispersed Phase Zero Equation ;air- Dispersed Phase Zero Equation

FLUID PAIR MODLES:

Interphase Transfer: Particle Model

Momentum Transfer: Drag Force - Grace

Turbulence Transfer: Sato Enhanced Eddy Viscosity
Mass transfer- None.
If I solve with this parameters all goes right.
My questions are:
1)If i interested in modeling the interactions between the oil droplets or gas bubbles (coalescence or breakup), what would i need to model them?
2)My supervisor said that there is mass transfer occur between the oil droplets and gas bubbles and this phenomena is the cause of separation of oil from water by the air and rising to the surface, is this correct?
3) Does the speech in the below paragraph relate to my research?
7.15.2. User Specified Mass Transfer
For advanced applications, it is possible to directly specify the interphase mass transfer sources. You may specify the interfacial mass flux or the interfacial mass flow (volumetric mass source) between any pair of phases. The latter is more appropriate for volumetric mass transfer processes such as breakup and collision. For details, see User Defined Interphase Mass Transfer in the CFX-Solver Theory Guide.

Release 16.2 - © SAS IP, Inc. All rights reserved.

Thank you for help.