Soot particle size distribution reconstruction in a turbulent sooting flame with the split-based extended quadrature method of moments

The Method of Moments (MOM) has largely been applied to investigate sooting laminar and turbulent flames. However, the classical MOM is not able characterize a continuous particle size distribution (PSD). Without access information on PSD, it difficult accurately take into account oxidation, which crucial for shrinking eliminating soot particles. Recently, Split-based Extended Quadrature (S-EQMOM) proposed as numerically robust alternative overcome this issue (Salenbauch et al., 2019). main advantage that number density function can be reconstructed by superimposing kernel functions (KDF). Moreover, S-EQMOM primary nodes are determined individually each KDF, improving moment realizability. In work, combined with Large Eddy Simulation/presumed-PDF flamelet/progress variable approach predicting formation in Delft Adelaide Flame III. target flame features low/high propensity/intermittency comprehensive flow/scalar/soot data available model validation. Simulation results compared experimental both gas phase particulate phase. A good quantitative agreement obtained especially terms volume fraction. PSD reveals predominantly unimodal/bimodal distributions first/downstream portion flame, diameters smaller than 100 nm. By investigating instantaneous statistical behavior at tip, found experimentally observed intermittency linked mixture fraction fluctuations around its stoichiometric value exhibit bimodal probability function.