Traditional (Density-Entropy) SPH
Traditional, GADGET-2-like, Density-Entropy SPH is available in SWIFT with a Monaghan artificial viscosity scheme and Balsara switch.
To use this hydro scheme, you need no extra configuration options – it is the default!
As it uses a very simple, fixed artificial viscosity, only the
SPH:viscosity_alpha parameter has any effect for this scheme. This will
change the strength of the artificial viscosity throughout the simulation,
and has a default of 0.8.