A numerical simulation of an ammonothermal process for growing GaN bulk single crystals has been performed. The autoclave and growing crystal are assumed to be axisymmetric and the raw material is assumed to be a porous medium. Heat transfer by natural convection is discussed in terms of the open-space ratio of the baffle and the height of the crystals. Simulation results show that a larger open-space ratio, at least 30%, is better for the crystal growth from the viewpoints of average surface temperature and flow direction.
ASJC Scopus subject areas
- Physics and Astronomy(all)