Chulalongkorn University CEPT
This project examined the transport phenomena in the synthesis of ZnO by physical vapor transport. In the numerical simulations Zn and O2 were treated as diluted species transported in nitrogen. The modes of transport were investigated and the velocity, temperature and concentration profiles in the reactor under reaction conditions elucidated. Also a parametric examination was conducted to determine the effect of physical variables on the flow. It was found that in open reaction conditions at high pressures convective transport dominates, while lower pressures lead to diffusive dominance and significant mass transport resistance. The linear temperature profile assumption was validated; further it was found that thermal expansion is insignificant, hence free convection can be neglected.
Worcester Polytechnic Institute
Major Qualifying Project
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