Help with concept: Roiling Fireball
I'm working on an animation project that consists of cavemen discovering fire. The characters are very stylized, so I don't want to fall back on a simple/realistic fire. The style is very cartoon like so, what I'm envisioning is sort of a ball-ish shape of fire with flames rolling up the sides. As the flames roll up, they stretch the surface of the sphere outward.
I've been having a hard time explaining this to people, so imagine running a finger up the inside of a shirt while pressing outward, as you move upward, the cloth stretches around the finger and returned to it original places after the finger passes. Another way that I've tried to explain it is as though the flames were boiling out of the bottom of the ball, and dripping upward.
I've created a rough(very rough) example of what I'm talking about, and I'll upload that.
But the stumbling block in my way is that I have no idea how to model what I'm looking to do. Anyone have any ideas?