There is a software called EmberGen that is used for fluid simulations (primarily fire and smoke). It is real-time (if you have a decent computer) and really easy to use. There is a 14-day free trial, but after that, it is $20/month. After using the software for around 2 hours and watching 20 minutes of tutorials, I made these simulations:
Now I can make torren crovus cross, the kingslayer
You can import 3d models from Blender to use as emission shapes.
ghost animation lets gooo