The Enzo code is frequently used for simulations of cosmological structure formation. As a result, it's often useful to have images and movies of various aspects of this sort of simulation, including the adaptive mesh grids. A variety of images and movies are available from this gallery.
The simulation used here was generated using version 2.4 of the Enzo code. The simulation is of a volume of the universe 128 Mpc/h (comoving) on a side, with a 2563 root grid, 3 levels of adaptive mesh refinement, and with collisionless dark matter and non-radiative hydrodynamics. Links to the movies on YouTube are provided, but you can also directly download high resolution mp4 versions of the movies (which are between 5-30 MB apiece) via the links below the embedded YouTube movies. Long (~25 second) and short (~12 second) movies are available, with both versions covering exactly the same time span. For each flavor of movie, one pair of short/long movies have timesteps that are uniform in physical time (with each timestep being roughly 20 million years), and the second is uniform in cosmological expansion factor (with each timestep being roughly da ~ 0.0017). Movies were generated from individual frames using the ffmpeg tool. Note that images and movies that zoom in on a single Local Group-like halo can be found here.
Some potentially useful resources:
Attribution: if you choose to use any of the movies or images on this site, please use the attribution: "(c) Brian O'Shea (MSU) and the Enzo Collaboration, 2014"
Projection of baryon overdensity through the entire simulation volume.
long
(25 s) mp4 movie - timesteps constant in time
short
(12 s) mp4 movie - timesteps constant in time
long
(25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor
Projection of density-weighted baryon temperature through the entire simulation volume.
long (25 s) mp4 movie - timesteps constant in time
short
(12 s) mp4 movie - timesteps constant in time
long (25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor
Projection of maximum grid level along the line of sight through the entire simulation volume. Simulation has a maximum of 3 levels of adaptive mesh.
long (25 s) mp4 movie - timesteps constant in time
short (12 s) mp4 movie - timesteps constant in time
long
(25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor
All of the "thin slice" projections have the width of the simulation volume (128 Mpc/h comoving), and are of a slab that is 4 Mpc/h (comoving) thick, so 1/32 of the simulation volume thick. A thin slab makes it easier to relate specific physical structures with each other, and with the adaptive mesh grids.
Projection of baryon overdensity through the thin slab.
long (25 s) mp4 movie - timesteps constant in time
short (12 s) mp4 movie - timesteps constant in time
long
(25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor
Projection of density-weighted baryon temperature through the thin slab.
long (25 s) mp4 movie - timesteps constant in time
short (12 s) mp4 movie - timesteps constant in time
long
(25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor
Projection of maximum grid level along the line of sight through the thin slab. Simulation has a maximum of 3 levels of adaptive mesh.
long (25 s) mp4 movie - timesteps constant in time
short (12 s) mp4 movie - timesteps constant in time
long
(25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor
Projection of baryon overdensity through the thin slab, with level 1 and 2 grids overlaid in white.
long (25 s) mp4 movie - timesteps constant in time
short (12 s) mp4 movie - timesteps constant in time
long
(25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor
Projection of baryon overdensity through the thin slab (shown in greyscale), with level 1-3 grids overlaid in colors. Near the end of the movie, level 1 grids are cyan, level 2 grids are green, and level 3 grids (the finest resolution) are shown in red. The root grid is not shown in this movie.
long (25 s) mp4 movie - timesteps constant in time
short (12 s) mp4 movie - timesteps constant in time
long
(25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor
This movie shows the evolution of the baryons in the cosmological volume in temperature-density phase space over the age of the universe. Individual halo mergers (where gas is shock-heated) can be seen as ripples in this movie. Note that cells are colored by the mass of gas contained in them, with red and orange cells containing the most gas and blue and purple cells containing the least. Cells that are white have no gas in them at all.
long (25 s) mp4 movie - timesteps constant in time
short (12 s) mp4 movie - timesteps constant in time
long
(25 s) mp4 movie - timesteps constant in expansion factor
short
(12 s) mp4 movie - timesteps constant in expansion factor