Update the signal velocity in more locations
This updates the signal velocity in more locations. It also:
- Removes the
du_dt
condition on the time-step in the pressure based schemes (we have never seen this make a difference and ruins the performance of runs with cooling) - Updates the drift of the pressure-energy schemes to include a factor of
u_new / u_old
as this updates the pressures to be more consistent with the new value of the internal energy.
@lhausammann can you please make sure you are happy with the changes to the pressure schemes.