Dissipation element analysis of non-premixed jet flames

Abstract

Abstract

Self-similarity of turbulent jet flows with internal and external intermittency

“…2017; Denker et al. 2020; Gauding et al. 2021), have recently gained relevance for mixing and combustion models, this result has a direct application.…”

“…By analysing structure functions across the jet, we demonstrated that higher-order statistics conditioned on fully turbulent regions inside the turbulent envelope are largely independent of external intermittency and recover self-similarity at small and intermediate scales. As zonal models, for example based on gradient trajectories (Mellado et al 2009;Gauding et al 2017;Denker et al 2020;Gauding et al 2021), have recently gained relevance for mixing and combustion models, this result has a direct application. Furthermore, it is necessary to examine how the conditional structure functions S n,tt depend on the threshold of the enstrophy that determines the position of the IB.…”

New symmetry-induced scaling laws of passive scalar transport in turbulent plane jets

“…A temporally evolving turbulent jet set-up is known to be a good compromise between our ability to use accurate numerical methods, the computational efforts for sufficiently large Reynolds number and capturing the physics of turbulent jets (e.g. da Silva & Pereira 2008;van Reeuwijk & Holzner 2013;Krug et al 2017;Cimarelli et al 2020;Denker et al 2020). Therefore, the combination of newly derived similarity solutions and DNS of temporal jets seems to represent a useful combination of tools for the analysis of the important features of turbulent jet flows.…”

“…2020; Denker et al. 2020). Therefore, the combination of newly derived similarity solutions and DNS of temporal jets seems to represent a useful combination of tools for the analysis of the important features of turbulent jet flows.…”