Then two 3D studies are completed to analyze the effect
of the boom angles on the flow and the catch probability.
A large scale simulation is performed with COMSOL
and gives the 3D flow with several boom angles. Some
hypotheses are not clear (condition used on the boundary
at the end of the barrier and on the barrier, pressure
gradient due to gravity not present at the outlet), but the
results give more information on the effect of the boom
angle. The finer study with CFX models the barrier more
precisely, but with a too coarse mesh near the skirt and a
domain too small to impose a pressure at the outlet. Nevertheless,
the 3 studies give the same parameters range
which allow the particles to be caught, and a good idea of
the efficiency of the global system.”