Particle Ignition is used to start the initial combustion process of reacting particles, which typically depends on the temperature of the Eulerian fluid phase around the particle. However, before the reactions are calculated, the fluid temperature will often be low. Therefore, this temperature can be temporarily increased to the specified Ignition Temperature the first time a particle is solved. Afterwards, the particle combustion itself should deliver enough energy in order to increase the fluid temperature above the required ignition temperature. The Particle Ignition capability is only available for steady-state simulations.