[Hawxliquid]

Hello everyone !
I have quite a bunch of questions, as I am not familiar with injections and evaporation.
I am trying to do a simulation of a hybrid rocket injector. Per say, the injector will inject liquid N2O through an injector, but this N2O will be injected in the combustion chamber, and thus evaporate.
I wanted to define the injection total mass flow ? As a boundary condition ? Also, how to chose the number of droplets/stream ? I followed some tutorials ( like " Modeling Evaporating Liquid Spray " from ANSYS ), but it is not clear how to deal with what I asked.

On another hand, such a simulation is possible ? I found some paper doing it, but they clearly seems better at it than I am. So, is there a way to convert this complicated problem, to a gas injection ? (Where N2O would react simply as a gas, with my fuel ?)

Thank you !