FoamFile { format ascii; class volVectorField; object U; }
dimensions [0 1 -1 0 0 0 0];
internalField uniform (25 0 0);
boundaryField
{
 inlet { type fixedValue; value uniform (25 0 0); }
 outlet { type zeroGradient; }
 sides { type symmetry; }
 ball
 {
  type rotatingWallVelocity;
  origin (0 0 0);
  axis (0 0 1);
  omega constant 50.2654824574;
 }
}
