The fluid dynamics of an inverted metalorganic chemical vapor deposition (MOCVD) reactor for the growth of TiO2 films are studied. The coupled transport equations are solved by numerical integration using a control-volume-based finite difference method. The model predicts gas velocity, temperature distribution, concentration of reactant gas, and deposition rate. The effects of radiation heat transfer, external heat transfer for the reactor walls, thermal diffusion, susceptor surface temperature distribution, and reaction rate order are considered. Simulation results are verified by experiment.