[xiaor1]

Hi, every one,

I am just new to OpenFoam and now my case is a inclined rectangular tank with a horizontal water surface(water depth is very low) as the initial condition. But when I go through Dambreaking tutorial, I find that I can only define a box-shape fluid domain rather than a triangle one, which doesnot work in this case. Could anyone please tell me that how to define such a fluid domain as in the pic?shallow water in tank.pdf Any information is appreciated. Thanks!

[alexeym]

Hi,

If your mesh is not inclined, you can use rotated box, so the intersection of the mesh and rotated box is triangle (case A on attached image, search the forum for syntax of rotatedBox in setFields), if your mesh is inclined, you can use just box (case B on attached image).

[xiaor1]

Originally Posted by alexeym

Hi,

If your mesh is not inclined, you can use rotated box, so the intersection of the mesh and rotated box is triangle (case A on attached image, search the forum for syntax of rotatedBox in setFields), if your mesh is inclined, you can use just box (case B on attached image).

Thank you! Alexey Matveichev,

I used the first method u mentioned and it works quite well. Thanks for help!

Best regards

[behnazghp]

Hello
Could someone please help me define a volume of water above a sloped surface? Basically, I need to define a triangular volume of water in setField. Please see the figure attached.

Thanks

[ahparvin]

Hello behnazphp

I don't know if after a long time can you reply back to me. but I have a similar issue.
could you finally define directly the initial conditions by rotatedboxToCell in setFieldsDic?

Thanks

[ahparvin]

Originally Posted by ahparvin

Hello behnazphp

I don't know if after a long time can you reply back to me. but I have a similar issue.
could you finally define directly the initial conditions by rotatedboxToCell in setFieldsDic?

Thanks

Hello;

I have a similar issue. I want to define a trapezoidal shape initial condition for a dam break problem. This shape is formed from overlapping the Mesh and a rotated box with different alpha values.
I tried to do that by defining a rotatedboxTocell in the setFields dictionary.
However there is no error in running setField but after that in initial conditions, I can not see any sign of water alpha = 1.

Any of you can help me with that?


autodraw 1_4_2022.jpg

/*--------------------------------*- C++ -*----------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     | Website:  https://openfoam.org
    \\  /    A nd           | Version:  7
     \\/     M anipulation  |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       dictionary;
    location    "system";
    object      setFieldsDict;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

defaultFieldValues
(
    volScalarFieldValue alpha.water 0
);

regions
(
    rotatedBoxToCell
    {
        name    rotatedBox1;
        type    cellSet;
        action  new;
        source  rotatedBoxToCell;
        origin  (0.3 0.2 10);
        i       (-0.1 -0.1 0);
        j       (0.1 -0.1 0);
        k       (0 0 -20);
        
            fieldValues
        (
            volScalarFieldValue alpha.water 1
        );         
    }  
       
);

[mohammedtareq]

hi xiaor1
can u please explain how u get the triangle box for water area i try use Rotatedbox utility but can not define the i , j ,k vectors