Figure 3.24 is an illustration of a case where for the same
particle characteristics (D = 0.01 m, ρ = 960 kg/m³ and a
depth of -1 m) a higher friction coefficient will prevent the
particle from escaping.
Given the findings of the previous trajectory simulations,
a last analysis is made considering U0 = 10 cm/s for a
density range of [960,1000] in the [10mm, 100mm] diameter
range and is depicted in Figure 3.25, for a friction coefficient
Cf of 0.1.
One important remark that has to be made is first that
the friction coefficients employed in this study are rather
small and consider lubricated conditions. Second, the
particle-particle interaction is not considered, nor the
particle accumulation. Third, no ballast nor protuberances
are considered in the bottom part of the skirt. The
addition of these features should allow fewer particles to
escape from the skirt.