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A two-dimensional axi-symmetric turbulent model of an Inductively Coupled Plasma (ICP) reactor is presented to observe the effect of quenching position and initial feed rate injection on the final particle size (silica). The model is developed with the Computational Fluid Dynamics (CFD) software Fluent-FPM, coupling three different models in order to describe the plasma generation, particle evaporation and aerosol growth phenomena. Three different quenching designs, with variation of the initial particle feed rate, are analyzed. Results show how the final size of particles is affected by the variation of these parameters. This study is validated with the experimental results reported by [1], and good agreement is observed specially for quench injection cases.PACS : 52.65.-y