I am working on the heptane simulation in a constant combustion chamber. I have created a reduced chemkin pro file (192 species and 1112 reactions) from a detailed one.

I want to inject heptane spray into a pressurized closed chamber to create chemical reactions and combustion. For that I have prepared every think (geometry, mesh, boundary conds, ..).

I applied these set up in Fluent:

1. Energy equation

2. k epslon viscous flow model

3. operating condition of chamber 21 bar

4.constant temperatures at chamber walls

5. Air is taken as an ideal gas

Run for steady state to get the initial condition, Then:

a. Change to unsteady state

b. using species transport model -imported chemkin mechanism (reduced heptane file)

c. using DPM to create heptane injection (used point cone)

d. apply time step size and number of them and run calculation

I got the spray but no combustion?

Should I use another species model or what to do?

The help is really appreciated.

Osama