Learning Forum

[liamjones32]

I have a 2D section of a circular enclosure with a circular container (with a dished end at the top) in the middle full of water. The circular container empties into the enclosure through the two orifices at the bottom. The water must travel against gravity over a boundary before it reaches the surrounding enclosure. This is shown in the image below.

[Rob]

I can see a line in the mesh, what is it? I'm also wondering what the inlet/outlet are doing there, the arrows are a hint.
As an aside, in 2d don't pick any surfaces when you plot contours.

[liamjones32]

So I've not set any inlets in this simulation. I followed a tutorial which said to put the top of the circular container as an outlet, ensuring that the volume backflow fraction is 0.
Do the arrows indicate the direction of flow out of the outlets?
The line in the mesh represents the wall of the circular enclosure, not sure if this needs to be included?
This is how I want the fluid to flow out of the two bottom orifices FYI.
Thanks for your help!

[Rob]

The arrows are a graphical indicator for inlets and outlets. The top of the whole domain would (probably) be a pressure boundary, backflow as you correctly say is no liquid. The tank bit wants to be wall (and wall:shadow) with interiors where the flow leaks out. I suspect you've either not shared topology or have labelled something as inlet/outlet which has overwritten the boundary types. Note, in 2d you're modelling a 1m thick domain. If it's a round tank you might want to review the axi-symmetric approach.

[liamjones32]

Great thanks for your help!