t-joint model with species transport without react

Pathway

If I simulate t-joint model, one inlet is water-liquid, secnod is air inlet and third is pressure-outlet.

Which method should I use?

If I use species transport without reaction, in material panel what should I choose in mixture?

And there's no example to show how to turn off reaction in species transport panel.

Can someone show me the steps or examples!

Thanks a lot.