Angular Momentum conservation

I ran the rotating variant of the TrueLove Collapse problem. Here is an animation with density contours and the particles along with their spin vectors.

Here is the angular momentum of the gas, the particles, and the internal spin of the particles in the X, Y, and Z directions (top to bottom)

And here is a closeup of Jz of the gas, the gas+particle, and the gas+particle+spin

I'm a little surprised by the ratio of spin to angular momentum, but I guess in a binary system, there is a lot more angular momentum in the orbit of the stars, then in the rotation of the stars themselves. It is also surprising that the Z component of angular momentum of the particles becomes positive at times - but perhaps that has more to do with the choice of the center of the origin…

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