Future Challenges in the Modelling and Simulations of High-pressure Flows

Abstract

The study of high-pressure turbulent combustion is a relatively new field in the realm of combustion studies. The coupling between the conservation equations and the equation of state is examined here in order to highlight the existing challenges in performing accurate numerical simulations at high-pressure conditions. The multi-species mass fluxes and the heat flux contained in the conservation equations are those derived from fundamental physics and incorporate transport properties computed using models valid at high-pressure situations. The intricacies in evaluating results obtained from the corresponding simulations with experimental data are addressed. The numerical approaches that stem from either lack of experimental initial condition information or from differences between the experimental configuration versus the simulation configuration are discussed. Experimental difficulties are also addressed, particularly those related to obtaining meaningful data to discriminate between high-pressure models and atmospheric-pressure models.