Flame ModelΒΆ
The elemental flame model consists of a laminar flame stabilized in a stagnation flow. The parameters of the stagnation flow may be imposed explicitly, or provided through coupling with an outer flow within which the elemental flame is embedded. The kinematics of the coupling between the elemental flame and the outer flow have been described elsewhere [#Marzouk1999]. Here, the flame is parameterized by the strain rate and position (radius) of the stagnation point in the non-reacting flow.
The stagnation flow models are described in Strained Flame Configurations. The general 3D conservation equations for mass, momentum, energy and chemical species are reduced to one dimension by using a boundary layer approximation across the flame. The derivation of these governing equations is contained in Section Governing Equations. The boundary conditions for the elemental flame model are discussed in Boundary Conditions.