[xiaor1]

Hi everyone,

I am just new to OpenFOAM. Now I am doing sloshing water simulation in a rectangular tank, and the tank is rolling. the simulation is based on sloshingtank2D3DoF, but after I changed it into a free slip condition, the water seems to be able to penetrate the wall against the roll motion of the tank. attached pictures might better explain what I want to express.

You can see that the water is even decreasing, like penetrating the bottom. Someone told me that it might be that InterDyMFoam cannot handle a moving geometry with a slip condition. is that true? Any suggestion is appreciated. Thanks!

the following is the boundary file in constant folder.

6
(
walls //bottom of the tank//
{
type wall;
inGroups 1(wall);
nFaces 800;
startFace 121682;
}
wallr //right side bulkhead //
{
type wall;
inGroups 1(wall);
nFaces 98;
startFace 122482;
}
walltop // upper deck//
{
type wall;
inGroups 1(wall);
nFaces 40;
startFace 122580;
}
walll //left side bulkhead//
{
type wall;
inGroups 1(wall);
nFaces 98;
startFace 122620;
}
front //front wall//
{
type empty;
inGroups 1(empty);
nFaces 60900;
startFace 122718;
}
back //back wall//
{
type empty;
inGroups 1(empty);
nFaces 60900;
startFace 183618;
}
)

And the below are how I define the alpha.water, U and p_rho in 0 file

FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object alpha.water;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 0 0 0 0 0 0];

internalField uniform 0;

boundaryField
{
front
{
type empty;
}
back
{
type empty;
}
walls
{
type zeroGradient;
}
walltop
{
type zeroGradient;
}
wallr
{
type zeroGradient;
}
walll
{
type zeroGradient;
}
}

FoamFile
{
version 2.0;
format ascii;
class volVectorField;
object U;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [0 1 -1 0 0 0 0];

internalField uniform (0 0 0);

boundaryField
{
front
{
type empty;
}
back
{
type empty;
}
walls
{
type slip;
}
walll
{
type slip;
}
wallr
{
type slip;
}
walltop
{
type slip;
}

FoamFile
{
version 2.0;
format ascii;
class volScalarField;
object p_rgh;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions [1 -1 -2 0 0 0 0];

internalField uniform 0;

boundaryField
{
front
{
type empty;
}
back
{
type empty;
}
walls
{
type slip;
}
walll
{
type slip;
}
wallr
{
type slip;
}
walltop
{
type slip;
}
}

BRs,
Ran

[Chemicalengineer123]

Did you ever fix this issue? I don't think this is an issue with the slip boundary condition as I have found the same problem in the interDyMFoam mixerVessel tutorial. I reduced the gas velocity to 0m/s to observe the alpha value over time and it continuously decreases. I am currently trying to model some agitated vessels and this is having a big impact on my results. Any help would be greatly appreciated.