Including an outflow in the CND - Marvin

I am currently working on including the outflow from the central stellar cluster in my simulations. The standard setup that came along with the module that I am using is shown in the first animation (edge-on view, the color code shows the absolute value of the velocity in km/s), we see that we have an inflow rather than an outflow, it seems that the outflow is not able to escape from the central region. The outflow velocity is set to 700 km/s, the escape speed is 200 km/s.

Then I did some test runs that consist only of an outflow object embedded in an ambient medium. The second animation shows a run with the standard parameters (the outflow has a thickness of zero). The outflow reaches a velocity of 140 km/s, far below the chosen 700 km/s. Increasing the thickness to 0.1 pc (third animation) leads to outflow velocities of around 700 km/s, but there are still some numerical artifacts, probably due to an unsufficient resolution.

So I am currently trying to find adequate values for the resolution and for the thickness of the outflow that yield the correct outflow velocity and decrease numerical artifacts to a reasonable level.

​Animation of edge-on view of the absolute velocity

​Animation of an outflow with thickness 0

​Animation of an outflow with thickness 0.1 pc

Edge-on view of the absolute velocity:

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