spray an aqueous solution

Neser

I want to spray an aqueous solution containing 20% (by weight) Sodium Chloride concentration. The spray droplets will entrain into hot air. Therefore, an amount of water vapour will evaporate from the droplets and consequently the sodium chloride concentration will increase.

I created the sodium chloride aqueous solution as a variable composition liquid consisting of sodium chloride and water. Actually the properties of the solution depend on temperature and NaCl concentration. Now:

1. I cannot define Sodium chloride as a solid. This is because CFX cannot mix solid + liquid to create this mixture described above. 2. I cannot create a 'reaction' between solid and liquid. This is because CFX does not have the capability. 3. If I define the NaCl simply as a liquid at any random concentration, and then define the mixture's (i.e. NaCl +water) density as a function of temperature and concentration, CFX solver refuses. The solver requests the value of the concentration, even though I previously defined mass fraction of water and NaCl for boundary conditions. 4. If I decide to provide CFX with the concentration of the NaCl (as it requested) as, say 30%, and then define the boundary condition mass fractions of NaCl-Water as, say 20%-80%, there is a problem. The problem is that the resulting total concentration is now wrong because the initial concentration is 30%. In fact, the resulting concentration will be an unknown somewhere between 30-? %.

Any help would be most appreciated