[mpanch13114]

Hi,
I am testing a case called 2DRotatingTank. 2/3rd of the tank is filled with water whereas the rest is air. The idea is to rotate the tank at 240rpm for 500 seconds. I am using interFoam solver. When I test the case with rotatingWallVelocity, I get incorrect results, whereas swak4Foram produces correct results. But the difficulty with swak4Foam is that it produces a little bit oscillation and vortices between 30 and 100 seconds.

A same setup is done for both cases except the following changes in 0/U.

For rotatingWallvelocity there are no vortices, but the flow is not reaching the center of the tank at any time. Here is the file content of 0/U

 boundaryField
{
      walls
     {
         type            rotatingWallVelocity;
         origin          (0 0 0);
         axis            (0 0 1);
         omega           25.4;
         value  uniform (0 0 0);
}

For Swak4Foam, the flow is reaching the center of the tank but there are oscillations. Here is the file content of 0/U

boundaryField                                                                                                             
{                                                                                                                         
    walls
    {
         type       groovyBC;
         value      uniform (0 0 0);
         variables (
               "xx = pos().x;"
               "yy = pos().y;"
               "zz = pos().z;"
               "w = 25.1328;"
         );
         valueExpression "vector(-w*yy,w*xx,0)";
}

I have attached screenshots of results obtained at 500th second.

I am using OpenFOAM3.0 and Swak4Foam Version 0.3.2.

Is my settings for rotatingWallVelocity perfect? Why do I get different results?

Note that, if I remove value uniform (0 0 0); from rotatingWallVelocity it ends up with error immediately.

Also, I have observed that when I am testing the same case with rotatingWallVelocity in openfoam-plusv1606. It works well and it produces the same result as swak4Foam.