Introduction
This tutorial models the evaporation and combustion of a liquid fuel, using the dispersed phase modeling capability to compute coupled gas flow and liquid spray physics. The mixture-fraction/PDF equilibrium chemistry model is used to predict the combustion of the vaporized fuel. In this tutorial you will learn how to
Prepare a probability density function (PDF) file for a liquid fuel system -
Defi ne FLUENT inputs for PDF chemistry modeling -
De fine a discrete second phase of evaporating liquid droplets -
Calculate the flow field using the pressure based solver, including coupling between the discrete -

liquid fuel droplets and continuous phase

The mixture-fraction/PDF modeling approach allows you to model non-premixed turbulent combustion by solving a transport equation for a single conserved scalar, the mixture fraction. Multiple chemical species including radicals and intermediate species, may be included in the problem de nition and their concentrations may be derived from the predicted mixture fraction using the assumption of equilibrium chemistry. Property data for the species are accessed through a chemical database and turbulence-chemistry interaction is modeled using a betha-PDF