Why does my simulation predict unrealistic droplet evaporation rates?

Many users setup a droplet evaporation case in FLUENT and use default settings for material properties for the droplet. This is not correct as those are just placeholders. It is important to note that droplet material properties include saturation vapor pressure and evaporation temperature. Both should be realistic. For sat.vap.pressure, it is important to use a polynomial function of temperature or piece wise linear. Make sure the temperature range is set according to the thermal conditions of the droplet inside the domain. The evaporation temperature is set to the minimum temperature in the domain. Finally the diffusion coefficient which computes the mass transfer rate should be set correctly. Most of the time, you can use the default but if conditions are such that this binary diffusion needs to be adjusted then you should do so.

Show Form
No comments yet. Be the first to add a comment!