EUCLID satellite: Sloshing model development through computational fluid dynamics

EUCLID satellite: Development of a lumped parameter model for sloshing description

“…The requirements satisfaction is checked, for the dither acceleration profile, estimating the maximum rotational angle through the following formulation [3]:…”

“…For a more detailed description of the CFD simulations setup and for the full illustration of how to model the bladder through CFD, the reader can refer to a previous work of the same authors [3].…”

“…Surface tension is in fact necessary to simulate the bladder behaviour, because it is represented by a fluid. This fluid has some peculiar characteristics, which are connected to the physical properties of the real bladder [3]. The liquid is modelled as a Newtonian fluid, and no turbulence model has been applied, so the resulting fluid field is laminar.…”

“…The paper is organized as follows: a first section introduces the lumped model used, and a second section introduces the idea proposed for model calibration. The setup required for CFD simulations is only briefly described, as it has already been fully illustrated by the authors [3]. Finally, the assessment done comparing the lumped model results to the CFD results on the EUCLID case is reported.…”

Sloshing-aware attitude control of impulsively actuated spacecraft

“…This motion creates large, time-varying off-diagonal elements in the inertia tensor. Computational fluid dynamics (CFD) analyses have been proposed and are best suited to model the sloshing effect, but the difficulty to perform such simulations in real time renders them unsuitable for the purposes of control [6], [7]. In this paper we describe a control-oriented model in analytic form whose parameters are determined offline based on CFD computations.…”