[bench_]

Hi everybody,

I need your help. I want to simulate the atomization of oil by pressurized air in minimum quantity lubrication systems. As you can see them as serial connections of flow resistances, you have to simulate the whole channel in order to know what happens at the beginning/nozzle. I did some single phase simulations (air, ideal gas, turbulent) and got very good results about the air flow in the "atomization area". As a next step, I want to create a modell of only this area with a very fine mesh. Then, I want to add the second phase (oil) as a VOF drp and see what happens when the air passes it.

In my first sim (the complete channel), I created a plane at the point where the detail modell shall end and made a report for the pressure (4.8 bar Surface Average). The inlet pressure is 5 bar. When I try to simulate the detail modell, there is a reverse flow and no convergence although the pressure drop is positive. Can anybody help?