This kind of fire usually consists of flammable materials that are exited from a pressurized source and there have been source of ignition in the environment. The speed of flammables effects greatly on the kind of fire, because initially the exit speed must be high enough to be sent to the air into the jet, and secondly the flame will be con- stant at a point that the flame speed will be equal to the local velocity of the gas mixture. When the exit speed of flammables increases, the air increases (in the mixture) too and as a result fuel consideration decreases in the jet, the flame distances more from the fuel exit and finally when the flame is far enough, the fuel density is lower than the low limit of flammability and the fire (flame) extinguishes. In the modeling of eruptive fire, the thermal radiation is the only factor that is studied as the sample for the damage of this type of hazard. The aim of erup- tive fire modeling was assessing to the jet diameter and length and the rate of thermal radiation of burning jet at any point. It must be noted that in the modeling diagrams, the limit of radiation rate due to fire that causes severe injuries to humans is considered as 37Kw/m2