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@PHDTHESIS{Hehnen:1050014,
author = {Hehnen, Tristan},
title = {{S}imulation of {F}ire {P}ropagation, {B}ased on {M}aterial
{P}yrolysis},
volume = {75},
school = {Wuppertal},
type = {Dissertation},
address = {Jülich},
publisher = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
reportid = {FZJ-2025-05728},
isbn = {978-3-95806-875-9},
series = {Schriften des Forschungszentrums Jülich IAS Series},
pages = {VIII, 25, xcii},
year = {2025},
note = {Dissertation, Wuppertal, 2025},
abstract = {Uncontrolled fires in buildings pose significant threats to
occupants, the environment, property, and the continuity of
operations. Fire risk assessments are critical tools used to
identify hazards, determine the likelihood of their
occurrence, assess potential consequences, and propose
mitigation measures. Several methods exist for quantitative
analysis, ranging from simple hand calculations to advanced
computational fluid dynamics (CFD) simulations. Typically,
heat release rates are prescribed in these assessments and
are static. Primarily because the modelling of thermal
decomposition (pyrolysis) of combustible materials is
difficult. This dissertation consists of three publications
that deal with the design of parameter sets that allow the
simulation of pyrolysis, based on the heat feedback to a
sample material. From common small-scale fire experiments,
data are used to create the material models. The first
publication deals with the simulation of fire propagation in
cable tray installations. A proof of concept for a
methodology is presented in which material parameters can be
determined in an inverse modelling process (IMP). This IMP
uses experimental data as the target. The second publication
builds on the work of the first publication and improves it.
Several adjustments needed to be made in the previous work
after the IMP concluded to enable fire propagation. These
adjustments are here directly implemented in the IMP.
Further improvements are implemented to the process, such as
higher fluid cell resolution during the parameter estimation
process. The third publication moves away from the complex
structure of electrical cables and focuses on a pure
polymer: poly (methyl methacrylate) (PMMA). Further
improvements are conducted with even higher fluid cell
resolution. Furthermore, a wider range of experimental data
sets is available, which is used to improve the parameter
estimation.},
cin = {IAS-7},
cid = {I:(DE-Juel1)IAS-7-20180321},
pnm = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
(SDLs) and Research Groups (POF4-511)},
pid = {G:(DE-HGF)POF4-5111},
typ = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
doi = {10.34734/FZJ-2025-05728},
url = {https://juser.fz-juelich.de/record/1050014},
}