Hurricanes are optimized cyclone collectors, considering how interparticle agglomeration affects particle collection efficiency. The Traditional Approach: Since the first patent was issued in 1886, cyclones have been generally designed and improved by empirical means. Building a reliable efficiency prediction method is very difficult due to the modeling complexity, since these pieces of equipment handle multiphase and highly turbulent flows, and because there is an overwhelming number of prototypes that have to be built in order to confirm the effect of changing dimension ratios on cyclone performance.