| b | the slope of the linear regression line of the plot of | |
| c | specific heat (kJ/kg C) | |
| F(t) | thermal response function | |
| FTP n | flux time product defined | |
| h | convective heat transfer coefficient (W/m 2 K) | |
| h ig | total heat transfer coefficient (W/m K) | |
| k | thermal conductivity of the solid (W/m K) | |
| L o | the thickness of the solid (m) | |
| n | flux time product index | |
 | critical heat flux (kW/m 2) | |
 | radiant heat flux (kW/m 2) | |
 | minimum heat flux (kW/m 2) | |
| t ig | time to ignition(s) | |
| t m | characteristic time to reach thermal equilibrium(s) | |
| T ig | ignition temperature (K or C) | |
| T o | ambient temperature (K or C) | |
| TRP | thermal response parameter (kW s 1/2/m 2) | |
| ? | thermal diffusivity, k/pc (m 2/s) | |
| ? | density kg/m 3 |
TABLE OF CONTENTS 
