Autoignition Equation
The time it takes for a material to reach its autoignition temperature when exposed to a heat flux is given by the following equation
where k = thermal conductivity (W/(m·K)), ρ = density (kg/m³), and c = specific heat capacity (J/(kg·K)) of the material of interest. is the temperature, in Kelvin, the material starts at (or the temperature of the bulk material), and is the heat flux (W/m²) incident to the material.
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