The subject of study is the influence of sloshing liquid on board spacecraft and satellites. Experiments have been carried out with the mini satellite Sloshsat FLEVO, containing a partially filled water tank, in an orbit around earth. These experiments were supported by a computational model for 3D incompressible free-surface flow, including capillary surface physics and coupled solid-liquid interaction dynamics. Experimental results and numerical simulations are compared. The obtained frequencies in angular velocities are reasonably comparable at various satellite manoeuvres. The damping of nutation amplitudes observed in the simulations is too large, as a result of additional diffusion in the computational model. At low rotational rates and small-scale liquid motion, capillary effects are important for the satellite motion and the observed damping of manoeuvre-induced oscillations. In case of large-scale liquid motion, such as flat-spin manoeuvres, capillary forces are less important.
|Uitgeverij||University of Groningen, Johann Bernoulli Institute for Mathematics and Computer Science|
|Status||Published - 2006|