From what you describe the situation you have would have a free liquid surface between water/diesel and air. Flow Simulation is no equipped to handle multiple fluid phases within the same chamber so the full situation start to finish could not be simulated here. However, if you want to have your tank assumed to be totally full of water and diesel (only liquid in the tank with no air) starting in a mixed state then left to separate over time you could probably show just the full state and the liquids separating then.
If you want to simulate the situation involving air as well you may need to find a multi-physics package capable of phase change like COMSOL.
Thank You so much for your prompt reply. I haven't been able to get back to you due to my vacations.
Do you know of a resource or tutorial that I could use for the particular problem. I would prefer to use COMSOL and the multiphase simulation for the above problem.
All your help is highly appreciated!
Your problem is about free surface. 2017 has not able to handle with free surface problems.
But SW 2018 has announced that free surface can be solved by flow.Now 2018 beta is avaible.
You can test it
Thank You for the guidance regarding the limitations of SW17. Did you already try SW18 and do you think it will be able to handle the problem now?
I have not just tested it. So i can not able to answer your problem.
If you test it , it will be good feedback for us.