H Happy Bongers

TL;DR: In this paper, the effect of simplified transport models on the burning velocity of laminar premixed flames is compared with results obtained with a number of simplified models and the influence of the Soret and Dufour effects is evaluated.

TL;DR: In this article, a phase space ILDM (PS-ILDM) method is proposed to construct a manifold in the composition phase space instead of the composition space, so that the gradients of species concentrations and enthalpy can be used to include diffusion within the manifold.

Abstract: The recently introduced Flamelet Generated Manifold (FGM) method has proved to be an accurate and efficient reduction method for the modelling of premixed flames. The FGM method uses a chemical library based on one-dimensional unstrained premixed flames to model the chemistry of a multi-dimensional flame. Recently, the method has also been applied successfully to a so-called triple flame configuration, which is partially premixed. In this configuration, the gradient of the mixture fraction was relatively small compared to the flame thickness. In this paper the applicability of FGM in partially premixed combustion systems is investigated further. The method is tested in a planar counterflow configuration, which enables the control of the mixture fraction gradient. The gradient of the mixture fraction is changed by modifying the applied strain in one case and the inlet mixture fraction in the other case. The results show that, even though the mixing and flow time scales are of the same order as the...

TL;DR: In this paper, the non-premixed flamelet model of Peters and Pitsch, which does not include preferential diffusion effects, is investigated, and two similar models are presented, but without the assumption of unity Lewis numbers.