which one can find that only a little sand is separated
in the second hydrocyclone in case the liquid is pure
water. However, as the water cut becomes 0.75, 0.54
and 0.42, totally about 39.35, 49.04, and 70.46 percent
of sand particles are separated in the second
hydrocyclone, which even arrives at 56.53, 69.0 and
85.86 percent for smaller particles (