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CND with outflow - Marvin

To achieve a proper resolution of the central outflow I increased the refinement level in the center from 4 to 5 (corresponding to a resolution of 0.02 pc) and the thickness of the outflow to 0.3 pc (inner radius: 0.5 pc, outer radius 0.8 pc), corresponding to 15 cells. The grid layout is shown in the first picture. The first two animations (first: density, second: velocity) show a simulation with outflow object and gravity object embedded in an ambient medium (in 2D without disk and magnetic fields) and shows that the outflow is well resolved.

I did another 2D simulation with disk, cooling, outflow and gravity object, the last animation shows the inner 4 pc of the face-on density of the disk. Initially the disk has an inner rim of 1 pc, the outflow causes instabilities along the inner rim that lead to the formation of clumps. The clumps have sizes of approx 0.1-0.2 pc and masses of approx. 50 solar masses.

Outflow embedded in ambient medium: animation of the density

Outflow embedded in ambient medium: animation of the velocity

Outflow with disk in 2D: animation of the face-on density

Grid Layout for outflow simulations:

Clumping due to disk-outflow interaction: