An Embedded Boundary Method for the Modeling of Unsteady Combustion in an Industrial Gas-Filled Furnace

A new methodology for the modeling of unsteady, nonpremixed, axisymmetric reacting ow in industrial furnaces is presented. The method is an extension of previous work by the authors to complex geometries, multistep kinetics mechanisms, and realistic properties, especially thermochemical data. The walls of the furnace are represented as an embedded boundary in a uniform, rectangular grid. The grid then consists of uniform rectangular cells except at the furnace wall where irregular (mixed) cells may be present. We use nite volume differencing techniques for the convective, viscous, and radiative heat transport terms in the mixed cells, while a nite element-based technique is used to solve the elliptic equation arising from the low-Mach number formulation. Results from the simulation of an experimental natural gasred furnace are shown.