Initial conditions for pre-merger cluster simulation with ENZO

Initial conditions for ENZO (enzo-project.org) AMR simulations of a pair of massive clusters in an early merger stage. Nested initial conditions are needed to produce 2 sets of 256^3 nested grids, using ENZO's "inits" sub-program. The full AMR simulation can then run with enzo.exe -d param_amr.dat A simulation with 8 levels of AMR within the innermost 0.1^3 region, and Dedner-MHD (see param_amr.dat) took ~80,000 core hours on 512 cores in JURECA (now dismissed) @ Julich FZ. More info can be found here http://adsabs.harvard.edu/abs/2018MNRAS.474.1672V and here https://cosmosimfrazza.myfreesites.net/amr_clusters