[Rojj]

I am trying to predict the humidity of air around a pool using passive scalars.

Air moisture content (kg_vapor / kg_dry_air) is modelled as a passive scalar. Now I would like to introduce a BC to take into account the vapour released by the pool surface. I am not interested in the evaporation process so I am using a typical experimental result:

mv[kg/s] = Θ A (xs - x) / 3600

(this is the link for details)

that provides the amount of vapour in kg/s evaporating from the pool for a given water and air temperature and air humidity.

I am not sure how to introduce this boundary condition on the pool surface for the scalar. The scalar represents the concentration of vapour in air, but what I have is the absolute value of mass of vapour released.

My first thought was to consider a layer above the pool surface, calculate the average concentration from average air speed, incoming air concentration and water released from the pool and then use setfields.

Do you think this is a good approach?
Would it be better to use a multicomponent solver?

Thanks

[Rojj]

Any idea? Thanks!