[sayed_hamed_sajjadi]

Hi every body!
i am trying to have a very simple 2D simulation of Heron Fountain.

my problem is that i want the air to exert pressure on water and makes it to move up but it doesn't happen

i activated "2 Fluids" but "Incompressible".

and in physics tab:
Density evaluation
Gravity
viscosity and Turbulence

two fluids are loaded.

and in initial window; i defined a region that fills the domain with fluid with a fraction of 0, which is air , and after that i defined 3 other regions of water, friction =1, as was described in Wikipedia.

and solver gives me this messages:
pressure iteration did not converge in itmax= 200 iterations
at time= 6.93363E-02 cycle= 1 iter= 200 delt= 6.93363E-02
epsi= 1.298E-03 maximum residual= 3.153E+01 at i= 21 j= 12 k= 2 block= 1
restarting cycle with smaller time-step size
present relaxation factor omega= 2.000E+00
present time-step size delt= 6.934E-02

and also
dt<dtmin

when i rendered results, the water is acting weird?
do you have any suggestions?

i simulated this fountain by Water-Oil with the same settings and it seems to be alright but i have those issues by Water-Air.