I have two inlets and one outlet in a t-shaped mesh. I would like to make say water enter inlet 1 and benzene to enter inlet two, and see how quickly they mix. Can someone tell me how I can specify inlet 1's liquid to be water and inlet 2 be benzene. (The thermophysical properties only allows me to specify one liquid.)

Thanks

Specify your "background" liquid as water, in the normal way, using Molecular Properties.

Create an additional scalar, and define it as Benzine using the built-in database. Make sure the influence is set to "Active".

Set the scalar boundary values to 0.0 at the water inlet, and 1.0 at the Benzine inlet.

Now make the density and viscosity, etc. "Multicomponent" in Molecular Properties. This will make the physical properties a function of the mixture.