To make uniformly sized liquid droplets in immiscible liquid, the condensable vapor bubbles uniformly generated from a nozzle were fed into cold continuous liquid phase. To estimate the size of the condensed dispersed droplets, a non-spherical bubble formation model with phase change is proposed. By using the present model, the two-phase bubble growth curves, the babble shape change, and the molar number of uniformly dispersed droplets were simulated. The simulations correspond relatively well with experimental results.