Large-Eddy Simulation (LES); ignition spots with time-averaged flow field and mixing field information; ignition spots with velocities and mixture fractions time-averaged over the sparking time duration; shaped bluff-body turbulent nonpremixed burner; impact of spark location on ignition success; numerics and subgrid-scale modeling; SGS combustion modeling; Subgrid Scale (SGS) model; initial flame kernel and spark modeling; cold flow results; flame kernel development; ignition kernel development with inclusion of flow straining effects