Air-Water Multiphase VOF Simulation

Abhishek Shingala · September 27, 2022, 10:23

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 · September 27, 2022, 10:33

Quote:

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 · September 27, 2022, 10:37

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 · September 27, 2022, 10:49

Quote:

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...

September 27, 2022, 10:23	Air-Water Multiphase VOF Simulation	#1
Abhishek Shingala New Member Abhishek Shingala Join Date: May 2020 Location: Stuttgart Posts: 4 Rep Power: 5	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?

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September 27, 2022, 10:37		#3
Abhishek Shingala New Member Abhishek Shingala Join Date: May 2020 Location: Stuttgart Posts: 4 Rep Power: 5	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.