Modelling spread of fire in a tunnel

Alan N. Beard

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    2 Citations (Scopus)


    A non-linear model of major fire spread in a tunnel is described briefly. It employs the concepts of bifurcation theory and identifies the onset of instability with major fire spread in a tunnel. In particular, the model associates the existence of a fold bifurcation with dramatic fire spread. The purpose is to identify the thermo-physical and geometrical conditions which lead to instability and sudden fire spread. The particular case considered assumes the existence of a longitudinal forced ventilation and predicts the critical heat release rate needed for a fire to spread from an initial fire to a target object. The illustrative case of fire spread from an initial fire to a heavy goods vehicle (HGV) is presented; it is not restricted to this case, however. The model is identified with the name FIRE-SPRINT A3, which is an acronym of Fire Spread in Tunnels, Model A, Version 3. It is a development of an earlier model, FIRE-SPRINT A2. The current model takes greater account of thermal radiation than was done in earlier work and also assumes a more plausible flame shape.

    Original languageEnglish
    Pages (from-to)29-40
    Number of pages12
    JournalJournal of Applied Fire Science
    Issue number1
    Publication statusPublished - 2000


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