[Jasrin]

Hello everyone
I want to simulate mixing in a digester using interFoam solver with two incompressible liquids.
The geometry consists of an egg-shaped digester with a draft tube at the center of it (which contains a propeller inside) and an outflow and inflow pipe.
I have to simulate as the digester is filled with one fluid (sludge) and the second fluid (water) enters through the inflow pipe into the digester and mix. Furthermore, I have added one extra input of speed from the draft tube (to simulate the effect of the propeller).
I’m using SetfieldDict to say that the egg is filled with sludge.
The simulation ends after 0.004. I think I’m doing some mistakes when setting the boundary conditions and the SetfieldDicts.
I have attached all the cases, the screenshot of my conceptual model, and the geometry.
I have run this simulation with one fluid using simpleFoam and it worked properly.
I’m new to this and this is part of my master thesis. Can someone guide me a bit?

[URL="https://drive.google.com/file/d/1ujpZjrJ62tJ6Ikezy7qwe8JiF8uTFx6j/view?usp=sharing"]

Geometry.jpg

conceptual model.png

draftTube_in-outflow pipe.jpg

SnappyHexMesh.jpg

[mahsankhan]

Hello Jasrin,


I think for this purpose, you should use interMixingFoam, which is more appropriate for your case.

Since you are using only two incompressible fluids, you can set air as 0 in your whole domain, since interMixingFoam works with two mixing fluids and air.

I hope this helps!


Have a good day!



Ahsan

[Jasrin]

Hello Ahsan,

Thank you for your suggestion.

Have a nice day!

Jasrin