### 7.14.3. Mixture Composition

The residual material corresponds to stoichiometric products and its composition can be obtained by lookup in the Flamelet library for stoichiometric conditions. The species mass fractions in the fresh mixture with residual material are computed from mixture fraction and fuel tracer as follows:

| (7–89)

where is the mixture fraction conditional to the combustible fraction of the mixture, that is, the mixture without the residual material, see Equation 7–94.

The mass fraction in the total mixture is calculated by blending the fresh and burned fractions in the same way as without the residual material model:

| (7–90)

The species mass fractions for the flamelet solution, , and for inert mixing, , are provided by the flamelet library.

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