An analytical study to investigate small fire in a ventilated room is presented. Most existing studies are either numerical or experimental and correlations for predicting characteristics of flame propagation such as temperature difference, flame (plume) length and terminal velocity are based on empirical data. A simple mathematical -from the first principles- is developed to predict these characteristics. The predictions are compared with the published experimental data and good agreement has been obtained. Such a simple model would be very useful to practicing engineers for fire control programs, designing fire detection mechanisms.

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