So I'm trying to make a Hot-Water Rocket. But I want to make the necessary thermodynamics calculations first. What kind of flow will it be in such systems I think it's obviously going to be an unsteady flow but is it uniform or not? I also would love if you guys linked me to unsteady energy-mass flow of water problems. I tried google and my thermodynamics book but 99% of the problems are in steady flow. Thanks in advance.