Sloshing in vertical cylinders with circular walls: the effect of porous, radial baffles

The behavior of sloshing eigenvalues is studied for vertical cylindrical containers that have circular walls and constant (possibly infinite) depth. The effect of breaking the axial symmetry due to the presence of porous, radial baffles is analyzed. Examples of explicit solutions are constructed which demonstrate that at some frequencies the damping efficiency of these baffles is the same as that of the rigid ones having the same configuration.