Two-way coupling modeling through Eulerian Moment Method for spray injection in engine simulations

The ability to simulate multi-phase flows is of crucial importance for the prediction of engine performance and pollutant emissions. The flow generated by the injection of a liquid inside a combustion chamber being generally very complex, we only focus on Eulerian description of the dispersed phase in the present work. One of the main difficulties for Eulerian approaches is their ability to capture the polydispersity of the droplet size distribution in the evaporating spray and its impact on the interactions with the carrying gas flow. In that context, the development of Eulerian Multi Size Moment Method (EMSM) by Kah et al. has been a fruitful achievement [14]. However, within the framework of internal combustion engine (ICE) simulations, more improvements on EMSM need to be adressed in order to capture some relevant physical phenomena, one of them being the two-way interaction of the polydisperse spray with its surrounding gas phase. The aim of the present work is thus to give further insight in numerical resolution strategy of Eulerian/Eulerian two-way coupling. Consequently, some injection computations are conducted and validated by means of comparisons with a Lagrangian method. Both methods are implemented in IFP-C3D software [3].