[Saideep]

Hi Guys;

I know this is quite an old post but just got stuck with a problem recently.

So, i use interFOAM in OpenFOAM 2.3.1 and i would like to set values for the phases in specific regions of the domain.

Well I tried to initialize the values with our friendly setFields utility but it accepts only one set of values. The second set of value is omitted.

So, is it possible to set the values at specific discontinuous parts of the domain with the setFields utility that i am not aware of?

Else can i use the funkySetFields utility but it says the development is transferred further on to the utility named swakySetFieldDict.

Will funky utility work on OF 2.3.x else i have no option other than to use swakysetfieldsdict?

Thanks;
Saideep

[AmiN.D]

This is an old thread but I want give it a try and ask a question about setField, I'm simulating a U shaped barometer in 3D with snappyhex and interFoam and kinda confused about setting the initial condition for Alpha.
How can I set my SetField to get a results like the attached picture?

[fumiya]

Hi,

There are two scenarios:
1. Create a cellZone corresponding to your initial liquid volume with snappyHexMesh and use setFields with zoneToCell option
You might want to check the tutorial to crate a cellZone with snappyHexMesh: incompressible/pimpleFoam/RAS/propeller

2. Generate mesh without cellZone and use setFields with boxToCell option(You can also use setAlphaField utility)

Hope this helps,
Fumiya

[AmiN.D]

Originally Posted by fumiya

Hi,

There are two scenarios:
1. Create a cellZone corresponding to your initial liquid volume with snappyHexMesh and use setFields with zoneToCell option
You might want to check the tutorial to crate a cellZone with snappyHexMesh: incompressible/pimpleFoam/RAS/propeller

2. Generate mesh without cellZone and use setFields with boxToCell option(You can also use setAlphaField utility)

Hope this helps,
Fumiya

Thanks for the quick answer.
I think I would go for the second scenario [first option may take time to get to know everything there]

but I thought boxToCell is just for Hexa mesh and not for non-structural mesh. I couldn't comprehend giving a box coordinate in a pipe which can cover the red are [in picture above] at time 0 . But thank you for making me to read the User Guide again and correct my wrong assumptions.

[fumiya]

In the first scenario, mesh lines generally do not align to your initial liquid volume(particularly in the case of unstructured meshes as you wrote), so obtained initial alpha distribution might be in a zig-zag manner.
If the shape of your initial liquid volume is complex, you might want to use insideCells utility to create cellSet from the enclosed volume of the input stl geometry.

[keywords]
*insideCells: Create a cellSet for cells with their centres ’inside’ the defined surface. Requires surface to be closed and singly connected

Hope this helps,
Fumiya