|Resimulation of galaxy
clusters with Nested Initial conditions & fixed
We will study the onset and evolution of shocks and turbulent motions with a uniform high resolution and high
time sampling for a statistical set of moderate (10^14 Msol) galaxy clusters in the LCDM Universe.
We used the public version of ENZO.2.1 (Collins et al. 2010) plus a few developments to treat:
- forced mesh refinement
All runs were generated and analysed at the ITASCA Linux cluster at the Supercomputing Centre of Minnesota.
- First, a set of low resolution simulations were produced, sampling a total cosmological volume
of (64 Mpc)^3 for each object.
- The most massive clusters (M>10^14 Msol) were resimulated with 2 sets of
nested initial conditions of increasing spatial/DM mass resolution.
The DM mass resolution in the cluster region is mdm=1.2e7 M_sol
- Within the innermost (1/10)^3 of the box, we force the code to refine by x4, achieving
a uniform spatial resolution of 20 kpc (14 kpc/h) everywhere, since the beginning of the run.
Each object is therefore followed since the beginning to the end with 320^3 cells,
covering a comoving region equivalent to 2-3Rvir^3 at z=0.
- Physics: non-radiative plus reionization for 4<z<7.2.
- Saved Outputs: about 100 snapshots for each cluster, with a refined time sampling for z<1 (about 1 snaphost every 100 Myr).
- The "clean" data are presently stored under /project/jonestw/vazzaf/new_space/
|A preliminary draft introducing
some of the data and methods of this project can be
OF EVOLVING CLUSTERS
SHOCKS (under construction)
Left: cut (20kpc) showing the distribution of Mach number (log(M) is shown) reconstructed with the Velocity-Jump method.
Right: projected map of thermal energy flux across shock waves, for the full 320^3 box.
|TURBULENCE (under construction)