Evaluation of the unsteady flamelet progress variable approach in Large Eddy Simulations of the ECN Spray ASandro Gierth, Philip Haspel, Arne Scholtissek, Zhen Sun, Sebastian Popp and Christian HasseSci. Tech. Energ. Transition, 77 (2022) 5DOI: https://doi.org/10.2516/stet/2022004