Regimes of ignition of a porous body using a heat flux

The ignition of a semiinfinite porous body using a heat flux is studied numerically. The influence of the gas flow from the surrounding medium into the pores and of the heat exchange among the phases inside the body on the ignition regimes is studied. A critical condition is found that distinguishes the regimes of ignition and explosionless heating. The dependence of the ignition delay and coordinate of the ignition point on the system parameters is analyzed.