[Abhishek Shingala]

In air water VOF simulation, water flow is laminar, but the air may not.
As I am using adaptive mesh refinement, wall y+ around water flow is very low, but everywhere else because of the coarse mesh wall y+ value is between 7-14. Should I use turbulence model?

[FMDenaro]

Originally Posted by Abhishek Shingala

In air water VOF simulation, water flow is laminar, but the air may not.
As I am using adaptive mesh refinement, wall y+ around water flow is very low, but everywhere else because of the coarse mesh wall y+ value is between 7-14. Should I use turbulence model?

What is the goal of the simulation? Do you really need to describe accurately the stress transmitted to the air by the water jet ? If yes, you need to resolve the mixing layer air-water with a fine grid

[Abhishek Shingala]

Well, it is just filling simulation. Like filling oil in the enclosed housing completely from inlet, while doing that air will moves outwards from outlet.

[FMDenaro]

Originally Posted by Abhishek Shingala

Well, it is just filling simulation. Like filling oil in the enclosed housing completely from inlet, while doing that air will moves outwards from outlet.

Thus, you really don't need of any details of air turbulence...