Effect of Heat Transfer and Fluid Flow in a CVD Reactor on the Densification Rate of Carbon Brakes

The effect of heat transfer and fluid flow on the densification rate of carbon brake substrates inside a chemical vapor deposition reactor is investigated using non-Boussinesq equations. These equations are valid for large temperature variations and low Mach number flows. Surface to surface radiation between the reactor walls and the brake substrates is considered, where all surfaces are treated as gray and diffuse, while the gas is assumed to be non-participating. A Brinkman model has been used for the flow within the brake substrates. Moreover, implementation of a simple kinetic mechanism is included to account for chemical reactions.