Other title: "Computational fluid dynamicc: seventh international conference on CFD in the minerals and process industries"

A sloshing absorber consists of a container, partially filled
with fluid to possess a free surface. The absorber is
attached to the structure to be controlled, and relies on the
structure’s motion to excite the liquid. Consequently,
sloshing waves are produced at the free surface,
possessing energy dissipative qualities. The behaviour of
liquid sloshing has been well documented in the literature,
although its use as a structural control agent has attracted
considerably less attention.
The sloshing absorber’s ability to control a light resonant
structure is demonstrated experimentally. The effect of
liquid depth on control performance is analysed. An ideal
range is identified. Smoothed Particle Hydrodynamics
(SPH) is then used to model the dynamic
structure/sloshing absorber system. The objective is to
demonstrate the technique’s ability to reliably predict
fluid-structure interaction forces.
When tuned properly, these interaction forces generate the
required control of excessive structural oscillations. A
series of shallow liquid levels are investigated to generate
travelling free surface waves. Predicted free surface
shapes and the resulting structural response are then
compared to those observed experimentally. Close
correspondence is reported between predictions and
experiments, for a wide range of liquid depths. 
Seventh International Conference on CFD in the Minerals and Process Industries CSIRO, Melbourne, Australia 9-11 December 2009