Adaptive grid - Z open isn't working as it should

[LarsSonparsson]

Basic fire and smoke simulation using adaptive grid. Maximum expansion is limited, but the grid boundaries should be open.
Somehow when smoke reaches to the top of the simulator, it just doesn't continue through it, instead some smoke behaves like there is a invisible wall.

phoenixFD_adv_31401_max2020_vray4_x64_29344

[Svetlin.Nikolov]

Yes indeed, it's a limitation of the solver. Try reducing the vorticity and it should help somewhat...