Force pushing liquid through a tunnel

[JuhaHo]

I'm trying to find the best way (or some kind of way) to push liquid in pipe. I made a little drawing for this topic. So I have revolving tunnel, which should be filled when vertical and emptied when horizontal. Gravity of course will take care of the filling, but how to push the liquid out of the tunnel. It should be somewhat empty when turning to vertical position again. And for not to be too simple there's another tunnel behind rotated 90 degrees. So when one is filled, the other is simultaneously emptied. I real life it's handled with pressure.

[georgi.zhekov]

Hey,

How about using the Plain force to push the liquid? You can animate it to push in the direction you like.

[JuhaHo]

Thank's Georgi,

I'm working on a solution, where I have additional fluid emitter on the left side. It flush the liquid already in the tunnel to right side and when the tunnel is vertical again, it flush itself down to open container wall. There will be also tyFlow particle system and the particles should move right.