A detailed two-dimensional numerical study of the highly exothermic nature of synthesis of refractory materials is presented. The process is modeled by a two-dimensional, pseudohomogeneous model. The model equations, which are very stiff and exhibit varying time and length scales, are implemented in the commercially- available computational fluid dynamics code, FLUENT using user-defined-functions (UDFs). The implementation of the new model is validated using a sample problem solved earlier by Degreve et al. [1]. The new model correctly captured the complex behavior of the combustion front.

Keywords: gasless combustion, FLUENT user-defined-functions, two-dimensional combustion front