settling tank grease and liquid lead using density and difussivity
 

Hi guys,
I have been working on a settling tank filled with liquefied Lead and Grease. There is a mixture inlet. Before the pressure outlet I would like the mixture to separate. I have already run the simulation, but in the transition zone there is still a mixture. (boundary between the two liquids is not so well defined. I have added some pics with the model and setup of the study. What should I change or tune? should I run the simulation for a longer period of time?

Best regards,
Armando

anyone pls?
 

HELP please