**4. Conclusions**

One way and two-way coupled simulations of Stairmand High Efficiency Cyclone at four mass loadings have been performed and the results presented. It can be concluded that


certain loading condition, one way coupling is not able to correctly capture the effects of the forces that are acting on the continuous phase.

• The collection efficiency of the cyclone model is seen to increase from 62% to 70% on increasing the mass loadings from 0.05 to 0.3 with a marginal increase in pressure drop of only 4.8%.
