Moist Air

dinis

I am trying to simulate the thermal and airflow behaviours in the refrigeration envelope of open display cases. Since the operation of those equipments is very sensitive to relative humidity, i would like to evaluate the equipment's (+ evaporator) performance under various relative humidity conditions. So, it was considered the fluid as air with a water-vapor concentration given as function of relative humidity (Amagat's Law in ideal gas mixtures). Which model should i use to simulate this condition: 1) Species Transport without chemical reactions, considering a mixture of air with a mass fraction of water-vapor?

?(Since the misture is in gas phase, I have many doubts in the use of following models, considering water-vapor (gas) as droplets)? 2) Euler-Euler Multiphase model - Mixture model, considering a mixture of air with a volume fraction of water-vapor) or, 3) Since the concentration of water-vapor in the atmospheric air is very low, should i use the na Euler-Lagrange Approach - discrete phase model? Aferwards, i would like to introduce thermal radiation in the simulation. For this case, which model should i use to simulate the air(gas)+water-vapor(gas) to obtain more accurate results. Also, can anyone suggest me bibliographical references to find mean values to absorption and scattering coeficients, and to refractive index for air and water-vapor in the IR wavelength. Thanks,