The population balance model provides an appropriate mathematical framework for the modeling of crystal size distribution (CSD). In this paper we use computational fluid dynamics (CFD) for modeling quartz crystallization in the cyclone. The study of gas-phase changes leading to nucleation of the first solid particles has to be coupled with the study of the evolution of the particle distribution by solving a population balance equation via the Direct Quadrature Method of Moments (DQMOM).The Method used to produce nano-quartz particles is gas condensation. In this method, silica vapor with nitrogen gas at high temperatures mix with cold nitrogen gas and solid particles are quickly formed. Result predicted by Fluent show the formation of quartz nanoparticles in the cyclone.

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