Significance of droplet diameter in multiphase flo

Hbet

Dear Friends,

Can anybody tell me the significance of droplet diameter (a secondary phase parameter) that is defined in Define > Models > Multiphase > Algebraic Slip form.

I am trying to model a mixing chamber where pure air and pure water enter the chamber from two separate 1" diameter pipes and leave the chamber as a mixture.

I do not have the slightest idea of what the droplet diameter might be. Should I guess it, or is there anyway I can calculate it ?

Any comments will be highly appreciated.

Regards. Hbet