Translating Cluster Test
This test had the same set-up as for the static cluster test, except the
cluster was given a bulk velocity to translate it around the box once in 1
Gyr. Since there are no external forces acting on the cluster, the end profile
of the cluster should be identical to the initial one. This tests the Galilean
invariance of the codes. Images below, demonstrating the test, are from
Enzo (Zeus) .
Initial conditions
The profile of the cluster was identical to the static cluster test, but
with a bulk velocity of 2933.4 km/s so that, in 1 Gyr, it moved around the simulation box
once, returning to its original starting position. Boundary conditions had to
be periodic for this test.
Code Specifics
This test was particularly time consuming for grid codes. To help
this, Enzo dropped its initial grid resolution to 503, but added an additional level of refinement
maintaining a minimum cell size of 0.12 kpc. Flash maintained
the same resolution as for the static test, with a minimum cell size of 0.18
kpc. The two SPH codes also had the same set-up as for the static case.
