Large Eddy Simulation of premixed turbulent combustion using approximate deconvolution and explicit flame filtering

Scalar flux modeling in turbulent flames using iterative deconvolution

“…For h/∆ =0.25, this would ensure that the filtered flame thickness is sufficiently resolved throughout the domain [47]. This may be a strict bound, and in a recent actual LES with deconvolution h/∆ =0.5 has been used instead with overall good results [36] which is a reasonable resolution for an accurate LES simulation. This point leads to a further one: actual LES implementations using deconvolution-based modelling have been conducted for reacting flows, despite any errors/biases introduced by the numerical schemes used in LES.…”

“…However, recent implementations of deconvolution in reacting LES with overall good results [32,35,36]…”

Evaluation of deconvolution modelling applied to numerical combustion

“…More recently, two deconvolution algorithms have been proposed to tackle the closure of the equation regardless of the combustion regime. The first one consists in a Taylor expansion of the Gaussian filter [20] and the second one in the minimisation of a constrained quadratic function [21].…”

“…the resolved signal (1). Deconvolution models recently introduced in the literature -ADM, Approximate Deconvolution and Explicit flame Filtering (ADEF) [20], and the Regularised Deconvolution Method (RDM) [21] -are designed to recover under-resolved scales (2) from resolved quantities (1). Additional effort is needed to include unresolved contributions (3).…”

Requirements Towards Predictive Simulations of Turbulent Combustion

“…Examples of topology-free combustion models are finite-rate chemistry models, the eddy-dissipation concept, 2 probability-density function (PDF) methods, 3,4 and deconvolution methods. [5][6][7] These combustion models introduce limited assumptions about the flame structure, and are therefore considered to be applicable to a wide range of combustion problems. Topology-free models enable the incorporation of different combustion-physical processes, but are accompanied by higher computational complexity.…”