Simulation of Size Distributions of TiO2 Nanoparticles in a Propane/Air Flame
Size distributions of TiO2 nanoparticles synthesized in a propane/air flame CVD process have been simulated by CFD code Fluent. The flame is simulated by EDM and standard k-? model with non-equilibrium wall functions in the wall region. SIMPLE method is selected for pressure-velocity coupling and the convection term is discretized with first-order upwind scheme. Radiant energy absorption and irradiant are incorporated in the enthalpy balance by P1 model. Particle growth and size distributions are simulated by the implementation of integral collision kernel in particle dynamics and the condition of particle volume conservation into CFD code Fluent. Comparisons on number frequency size distributions between measured and predicted have been made and the results showed that the integral collision kernel gave reasonable predictions on both size and size distributions.