Mixtures and boundary conditions
 

We are trying to model a humid flow, starting with a solution we already have through air. We cannot use the same boundary conditions for a mixture so were wondering if anyone had any ideas about the best way to approach this.

Also, which type of mixture approach to use - we'd like a 60% humidity.

In addition to that we would like to put actual water droplets into the flow to see if they boil and disperse in the high temperatures and pressures and was wondering if anyone had done anything similar and how they went about it.

Re: Mixtures and boundary conditions
 

Dear Caroline,

Recently, i started the simulation of the ice formation on the surface of a refrigeration heat exchanger since the water vapour content of humid ambient air condensate due to latent heat loss. From your e-mail i think that your problem is the opposite, but i performed some initial simulations using the Species Transport Model to model the humid air flow. I calculate the dry air and water vapour mass fractions using the Dalton and Amagat Laws concept. Hope that helps.

Regards,