TITLE:
Finite Size Scaling of Flame Spread along Randomly Distributed Combustible Cubes
AUTHORS:
Yukinobu Yoshida, Akihiko Ito, Hiroyuki Torikai
KEYWORDS:
Percolation Theory, Finite Size Scaling, Flame-Spread Probability, Experimental Area, Porosity
JOURNAL NAME:
Open Journal of Safety Science and Technology,
Vol.4 No.3,
September
3,
2014
ABSTRACT: Flame spread in urban fire depends on quantity of combustible materials and their placement. The purpose of this study is to predict the flame-spread route by the rate of combustible area. In this experiment, we used combustible cube made from filter paper as a test sample, and combustible cubes and pores were randomly distributed in experimental area. Additionally, we examined non-uniform flame spread along combustible cubes in various porosities and experimental areas. Experimental results show that the flame-spread probability falls with increasing porosity, and despite uniform porosity, the flame-spread probability differs with the experimental area. When expanding the experimental area, less porosity is required to obtain zero flame-spread probability. To investigate based on finite size scaling of percolation theory for the change in porosity, we con-cluded that different thresholds exist for areas of all sizes. Because of the flame-spread progress stops in the thresholds, these porosities may be useful to predict fire hazard.