boundary problem

[Lidabao77]

Dr. Karnakov，in examples/205_multivof/clustering，how the boundary conditions are set.
Is the following code setting the top and bottom boundaries to slipwall?
set string bc_path inline "
slipwall {
box 0 0 0 10
}
"
Thank you！

[pkarnakov]

Yes, this code sets top and bottom boundaries to slip walls. box 0 0 0 10 means a box centered at 0 0 0 with a side of 20 (10 is half-size) in all directions. All cell faces that fall inside the box get their boundary conditions set to slipwall.
Here's some description of the geometric primitives https://cselab.github.io/aphros/doc/#geometric-primitives and then the boundary conditions in the next section.

[Lidabao77]

Thanks for the answer！

[gesx123]

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