what is the function of cell zone conditions in fluent ?
 

which part of the model will be defined by cell zone conditions?

What is the difference between the cell zone condition and interior surface body in boundary conditions ?

:D:D:D Thanks !

Cell zone conditions is where you set options related to the volume/zones. For simpler models you probably never have to touch these. But if you have multiple volumes with different materials and slightly different models in each (i.e. solid regions and fluid regions) then this is where you would set them.

The interior surface is the collection of interior cell faces. You probably also never have to touch this because usually you have BC's only at domain boundaries and not on the cell faces inside your domain.

many thanks! LuckyTran

One more question. LuckyTran

When I use VOF, like water and air.
In the cell zone condition panel, I can select mixture, water, air for the Phase.
What is the difference ?

Again Thanks

If you have water and air in this zone then you pick mixture.

This is again a multiple zone option. Sometimes you have another region/zone where there is only air or only water and you don't want to solve vof in this zone because it would be a waste.