[Krishna Sandeep]

Hi everyone
I am completely new to openFOAM and am trying to workout the " water level in a rotating tank" problem. I should find out the new surface of water and the pressure distribution inside the water. Please direct me how to solve it...if anyone have already tried it please give me a link to the files so that i can run the case.

[lovecraft22]

Is the thank cylindrical and it's just rotating around its center?

[Krishna Sandeep]

yeah the tank is cylindrical and is rotating about its vertical axis.....i want to see the vortex formation i.e., the shape of the free water surface..

[lovecraft22]

Then you just need to set your cylinder as a rotating wall in your U file;

 "cylinder_.*"
    {
        type rotatingWallVelocity;
        origin (0 0 0);
        axis (0 0 1);
        omega constant 3000;
    }

[kid]

Hi Lore,Hello sandeep
Is the tank going to be open or closed ? ( free surface model or regular internal flow or closed lid with two fluids (air,water))

[Krishna Sandeep]

The tank is closed. assume that the liquid is inviscid and free of surface tension. Water is filled up to half of the tank. What solver should i use? I've been doing the problem similar to that of dam-break case with different initial fields and viscosity and sigma as 0....is this correct?

[Krishna Sandeep]

The tank is closed. assume that the liquid is inviscid and free of surface tension. Water is filled up to half of the tank. What solver should i use? I've been doing the problem similar to that of dam-break case with different initial fields and viscosity and sigma as 0....is this correct? I ve given the rotating wall condition and can actully feel the wall rotating....

[iamed18]

Originally Posted by Krishna Sandeep

The tank is closed. assume that the liquid is inviscid and free of surface tension. Water is filled up to half of the tank. What solver should i use? I've been doing the problem similar to that of dam-break case with different initial fields and viscosity and sigma as 0....is this correct? I ve given the rotating wall condition and can actully feel the wall rotating....

I don't know how valid the inviscid approximation will work for this since the rotating boundary will be your entire driving force for the flow - if there's no viscosity near the boundary layer, then what reason would the fluid have to flow?

[Dhruval]

hi. sandeep,
have you found the solution?

[13msmemusman]

what if i want to input omega value from an algorithm??? means i am getting rotation value from an algorthm and i want to use it in solver.

Originally Posted by lovecraft22

Then you just need to set your cylinder as a rotating wall in your U file;

 "cylinder_.*"
    {
        type rotatingWallVelocity;
        origin (0 0 0);
        axis (0 0 1);
        omega constant 3000;
    }

[mpanch13114]

Hi,

I am working on a similar problem. Rotating wall velocity = Dirichlet boundary condition ?? or Are they different?

Regards
Panch