Cloud fragmentation and star formation (SPH simulation)

A gas cloud collapses under its own gravity, creating a number of proto-stars that merge together into larger stars. The computational domain is a cube with periodic boundary conditions (i.e. what leaves the left side appears on the right side, etc.). It's simulated using the IISPH solver.
Computed with SpaceSim
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[@CUBOSH]

more interesting than the gravity simulation is the concept of a finite universe that just seamlessly loops at the edges

[@michahermann7869]

Oh nice! Around 30s in it looks pretty much like the structure of the universe right now

[@ahaks7269]

I love rewinding the video to see how the particles collapse. The large body was not formed by coagulating gasses like other stars, it was formed by one 3-way collision of different proto-stars. It seems gravity tends to favor the early birds, eh?

[@ImMatthewGodzilla]

Well this one was satisfying!

[@zxaa2852]

it seems to send mini stars or hydrogen balls off into the distance after some collisions, so i wonder if some red dwarfs and brown dwarfs are formed from the result of these collisions

[@physixtential]

I see you have the boundary wrapping around. I'm curious what it looks like when two clusters attract across opposite corners, and if you can achieve an equilibrium sort of like a Lagrange point by placing two clusters equidistant across the boundary and the inside so they pull equally in both directions. I imagine it should stretch them into a cylinder. Is there a tree structure here that can be visualized or does every particle influence every other, or is there a max radius for influence smaller than the box?

[@pavelsevecek]

yes, you can definitely achieve an equilibrium, although it's an unstable equilibrium, so it will break by small perturbations.

[@user-in2do2xr2o]

Are those brown dwarfs?

[@ignited3443]

Niice

[@deltainfinium869]

Is it possible to make a computational area with looping properties a sphere?

[@pavelsevecek]

You can move particles to the opposite point on a sphere, but you can't loop gravity effects, it's not possible to fill space using spheres (without any overlap).

[@bbkevlogs4563]

I'm using Linux actually so how can I use opensph source. Can you kindly provide the source?