Magnetic towers

Find the paper draft here (31 may 2011).

25 May 2011

Each panel has a left and a right section where the latter was done in bluehive and the former at bluegene.

Left sections are adiabatic whereas right sections are cooling. Click to enlarge.

Density (left), beta (middle) and magnetic pressure (right).

The rotating case:

The hydro case:

Note towers are twice as tall as the ones I did before. Simulations are still running!. Hydro and rotational versions are running. The tower base radius is resolved by 24 cells.

4 Apr 2011

Bluegene! 512 procs, 64^3 + 2amr levels. Improved refinement criteria. Simulation stops due to memory problem.

Non-rotating tower: Click in the image below.

14 March 2011

64^3 + 1amr level. New thermal energy setup which forms low beta structures.

Preliminary results.

7 March 2011

AstroBEAR2, bluehive, 64^3 + 1amr level.

Preliminary results.

CLICK ON THE MOVIES BELOW TO PLAY THEM

3 March 2011

AstroBEAR2, bluehive, 64^3 + 1amr level.

Preliminary results. I see some divergence warnings of order 1e-13.

Azimuthal velocity=0.1*azimutal_Alfven_vel. Simulation was restarted

at about 75% of its total running time.

Azimuthal velocity=0.4*azimutal_Alfven_vel. No restarts.

31 Jan 2011

Scrambler, bluehive, low resolution fix grid test (amr test running now).

Preliminary field line movies. Rotating (left) vs non-rotating (right) towers.

Jan 2011

New setup. Will run in scrambler and high resolution.

Mon. 10 jan 11 meeting: gas in ALL the domain should be in a stratified configuration and hydrostatic equilibrium with a backgrund central gravitational field. Rotation should happen continuously within the WHOLE magnetic (initial) cylinder with an azimuthal velocity related to the azimuthal Alfvenic speed (yet slower than the keplerian speed for a star like the Sun).

Will present results of this investigation in the Magnetic Fields in the Univere III Meeting.

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Oct. 2010

A high resolution study, 256x256x256+1 amr level, is in progress, bluehive. Here is the very first snapshot: