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h1. Partially Premixed Combustion

Created using ANSYS 14.5

h2. Problem Specification

In this tutorial, you will learn how to set up and solve a turbulent reactive flow - particularly, a partially premixed combustion case, in which there are both premixed and non premixed conditions. You will:

# Use the probability density function (PDF) method forto track the mixture fraction and modeling the chemistry in the system (usually used for non-premixed, mixing cases)
# Learn the appropriate inputs and solver techniques using the turbulent Zimont Flame Speed model to close the turbulent quantities, in the fluid equationstypically used for premixed combustion cases. 
# Analyze the results of the system

The Zimont turbulent flame speed model includes the laminar flame speed (which determines the chemistry of the system) and the flame front evolution due to turbulence. The assumption to use this model is that the turbulence lengthscale in the flame is smaller than the flame thickness (Karlovitz number Ka > 1) where

{latex} $$
{Ka} = { (\nu \epsilon)^{1/4} \over (U_{laminar flame speed})^2}
$$

{latex}
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