Use the cooling time-step condition when computing dt. Better documentation. More uniform interface accross cooling functions.

Drift all particles before repartitioning

Drifting them afterwards can result in some cells having inconsistent particle lists, so this must be done first. This fixes the crashes I was seeing in MPI runs of the SodShock with 4x12 cores.


See merge request !241

Fixed bug in GIZMO_SPH hydro_get_internal_energy.

The energy stored in `conserved.energy` is not the thermal energy (per unit mass) `u`, but the total thermal energy `u*conserved.mass`. Updated `hydro_get_internal_energy` and `hydro_set_entropy` to reflect this.

See merge request !244

Set the default value of the subsize to 64M

Fix to #212. 

See merge request !243

Add the cooling infrastructure and the const_du and const_lambda

@dc-arri1 I have opened this merge request so that we can push the main changes into the master branch to make everything available to everyone.

I'll have a few questions for you here. I'd be great if you could answer them so that I can merge things.

See merge request !242

This shouldn't be necessary when we are drifting all, we have just repartitioned or the particles are just being initialised (before the first step)

Added the new cooling parameters to the parameter documentation. Renamed the parameters to differentiate them.

Drifting them afterwards can result in some cells having inconsistent particle lists, so this must be done first

Pack the task types and re-arrange the task structure to go from 80 bytes to 64 bytes.



See merge request !238

Only relink parts and gparts when we actually have parts and gparts

Any reason not do this ? We spend some time linking things even when we don't have anything to link. That would speed up `space_rebuild()` and `cell_split()` in the cases without gravity, the latter of those to two being a scalar part of the code this could be quite important.

See merge request !234

Stop integer overflows in scheduler

Fix a couple of integer overflows and stop no gravity particles being considered
as valid.

See merge request !237