[navasgustavo]

Hi everybody.

Does anyone tried a simulation in CFX to represent the efect of adding a chemical demulsifier to desestabilize a water in oil emulsion? How did go?

Any information would be very helpful.

Thanks!

[ghorrocks]

What particular part of the effect do you want to model? You can model this at many different levels.

[navasgustavo]

Thanks so much for the answer.

I need to represent the effect of add a surfactant agente (demulsifier) in the water in oil (W/O) emulsion. In the theory the demulsifier displaces the surfactant contained by crude oil around the water droplet, that leads to a water droplets coalescence and a subsequent separation of the water.

This phenomenon does not implies chemical reaction, it's a physical separation.

Could CFX represent this phenomenon somehow? How could do it?

PD: Here is a brief explanation of the phenomenon (http://petrowiki.org/Oil_demulsification)

[ghorrocks]

CFX does not have a built in demulsification model to my knowledge, but you might be able to adapt existing models or develop a new one (using CEL, additional variables and whatever else is required).

You can model the chemicals as multi-component mixtures, and the different phases as a multi phase model. As long as you know all the mechanisms taking place you have a chance of modelling it.