A Stable Pressure-Correction Scheme for Time-Accurate Non-Premixed Combustion Simulations

An efficient time accurate algorithm is presented for numerical simulations of low-Mach number variable density flows in the context of non-premixed flames. The algorithm is based on a segregated solution formalism in the class of pressure-correction methods. It shows good conservation properties and returns stable results, regardless of the difference in density between neighboring cells. In the illustrative example, a flamesheet model is used to describe the combustion of fuel and oxidizer. The stability of the method is discussed for a 1D channel flow, containing both fuel and oxidizer. Results for a 2D testcase of a reacting mixing layer are also shown.