Reacting Flows

Reacting Flows

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  3. When injecting a fuel droplet into the domain and calculating the mean mixture fraction through a plane, is it calculating the mixture fraction based on the droplets that pass through the plane or the evaporated species? Or both?

When injecting a fuel droplet into the domain and calculating the mean mixture fraction through a plane, is it calculating the mixture fraction based on the droplets that pass through the plane or the evaporated species? Or both?

Tagged: 19, combustion, Flamelet Models, fluent, fluid-dynamics, Species/Reactions
    • January 25, 2023 at 7:17 am
      FAQFAQ
      Participant

      Mixture Fraction can only be calculated based on gaseous species, so Mixture Fraction by definition excludes any fuel that is still tied up in the droplets. Ignoring the presence of the fuel droplets produces no error in the flamelet/flamespeed calculations. Liquid fuel never burns directly. It always has to go through the heating-evaporation process before any combustion can occur.

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