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Composition-space Premixed Flamelet Solution with Differential Diffusion for in Situ Flamelet-generated Manifolds by G. Lodier; L. Vervisch; V. Moureau; P. Domingo is a Engineering article available to read on EtoBox.

What is Composition-space Premixed Flamelet Solution with Differential Diffusion for in Situ Flamelet-generated Manifolds about?

Canonical flame problems have been widely used in the combustion literature to tabulate detailed chemistry. Prior to three-dimensional flame simulations, reference laminar premixed flames are usually solved in physical-space, and, diffusion flames in either physical, or, mixture fraction space. Compositionspace solutions would be convenient for premixed flame also, because all the points are relevant for chemistry, as a result of the zoom inside the flame zone; however, differential diffusion is not always easy to introduce with accuracy in these moving-frame coordinate systems, parameterized by their physicalspace gradients (or scalar dissipation rates). A projection is discussed in this paper that ensures that differential diffusion is properly accounted for, in any composition-space coordinates, thus allowing for perfect matching between physical-and composition-space solutions, even for premixed flames. Both a diffusion velocity correction, which is necessary to properly conserve mass with Fick's law, and a differential diffusion effect between the composition-space moving with the flow and fast diffusing species, are introduced. A procedure for rapidly building converged compo

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Author

G. Lodier; L. Vervisch; V. Moureau; P. Domingo

Publisher

Elsevier BV

Published

2011

Language

EN

Field

Engineering (Physical Sciences)