Water World! Houdini FLIP Fluids & Radial Gravity
Here's an animation of a rocky planetoid with a liquid core that ejects a stream of water in an aquatic volcano. The planetoid's gravity pulls the water back which settles into streams and pools.
You can read more about how the animation was created at my blog here: http://flexmonkey.blogspot.co.uk/2016/11/houdini-flip-fluid-radial-gravity.html