Authors:
Alexander Suvorov,Evgenia Kozhanova,DOI NO:
https://doi.org/10.26782/jmcms.spl.13/2026.05.00002Keywords:
Ignition Time,Standard Fire Temperature,Heat Conduction In A Wall,Time-Dependent Solution,Duhamel’s Principle,Finite Difference Solution,Abstract
This article determines the ignition time of a wall considering convective heat exchange between its surface and the fire source environment. The fire source temperature is treated as a given time-dependent function. Calculations of the wall temperature are performed using a semi-analytical method based on Duhamel’s principle and the finite difference method. A novel calculation procedure is developed for the fire source temperature that is changing with time as a piecewise-linear function. It was found that accounting for a gradual temperature rise in the fire source leads to results significantly different from cases assuming an instantaneous temperature rise. The influence of the heat transfer coefficient on wall ignition time is also demonstrated.References:
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