A dusty airflow contains particles 8 um in diameter and of density equal to 1800 kg/m3 .

A dusty airflow contains particles 8 um in diameter and of density equal to 1800 kg/m3 .  Design a conventional cyclone of standard proportions (Lapple type) that will remove 90% of these particles from a 2.5 m3 /s airflow.  In particular, what should be the values of the body diameter (D), inlet height (H), inlet width (W) and total height (Lb + Lc)?   A useful number in this context is: Air viscosity = u = 1.80 x 10-5 kg/(m.s).