Article
Engineering, Civil
Rahul Kallada Janardhan, Saani Shakil, Wei Lu, Simo Hostikka, Jari Puttonen
Summary: This paper presents a unidirectional coupling methodology for combining fire simulation with finite element analysis to study the response of long-span steel truss beams exposed to non-uniform temperature distributions. Experimental studies and fire simulations were conducted to analyze the impact of fire spread on the beams and the various responses of the beams in non-uniform temperature fields.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Jaiho Lee, Byeongjun Kim, Sangkyu Lee, Weon Gyu Shin
Summary: A validation study was conducted on the FDS model for fire scenarios involving multiple liquid pool fires in multiple compartments. The study compared the results obtained from open and blind simulations with experimental data. The analysis showed that the input parameters, such as the MLRPUA time curve, significantly affected the output parameters in terms of bias factor and model standard deviation.
FIRE SAFETY JOURNAL
(2023)
Article
Engineering, Chemical
Butong Gao, Shanyang Wei, Wei Du, Huan Yang, Yunyun Chu
Summary: The fire safety of ancient wooden buildings is crucial, and this study investigates the temperature and carbonization rate of partition boards under different heating conditions. Thicker partition boards lead to slower temperature rise rate and lower carbonization rate at the center point. Additionally, the thickness of the sample affects the burn-through time and carbonization rate in both horizontal and vertical directions.
Article
Energy & Fuels
Aaron Yip, Jan B. Haelssig, Michael J. Pegg
Summary: The composition of a multicomponent pool fire changes during burning, affecting key fire properties such as burning rate. Models based on fuel properties and correlations for flame height and temperature are crucial for predicting burning rate and assessing fire hazards in scenarios involving multicomponent fuels.
Article
Engineering, Environmental
Til Baalisampang, Elie Saliba, Fatemeh Salehi, Vikram Garaniya, Longfei Chen
Summary: Understanding the consequences of fuel release and fire accidents is crucial for the design and construction of buildings and infrastructures. A framework for simulating liquefied petroleum gas heat release and modeling evacuee visibility during fire events using CFD model has been proposed in this study, aiming to enhance fire safety in buildings.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Construction & Building Technology
Seyednavid Mardmomen, Hung-Liang (Roger) Chen
Summary: In this study, a multi-component hydration model was used to estimate the heat of hydration, adiabatic temperature rise, and compressive strength of concrete containing ground-granulated blast furnace slag (GGBFS). Different types of GGBFS were hydrated in limewater solution to measure their heat generations. The proposed model showed reasonable agreement with experimental results, making it a useful technique for obtaining the thermal and mechanical properties of GGBFS blended concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Environmental Studies
Nathan H. Schumaker, Sydney M. Watkins, Julie A. Heinrichs
Summary: As fire frequency and severity increase worldwide, scientists need to incorporate wildfire models into their research, but existing simulators are complex and difficult to use. Therefore, we introduce a user-friendly wildfire simulator, HexFire, designed for non-specialist investigators, and provide a detailed description of its design and mechanisms.
Article
Engineering, Environmental
Jiawei Cui, Lei Ni, Juncheng Jiang, Shuliang Ye, Saili Shen, Mengya Zou
Summary: This study analyzed the thermal decomposition of tert-butyl peroxyacetate (TBPA) in an adiabatic reactor using computational fluid dynamics (CFD) numerical simulation method. The results showed that under completely adiabatic conditions, the temperature distribution in the reactor was relatively uniform and the temperature gradient was effectively nonexistent. Additionally, the self-heat rate of the system during thermal decomposition was significantly higher in the full sensing state compared to the experimental process.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Civil
Michal Malendowski, Wojciech Szymkuc, Piotr Turkowski, Adam Glema, Wojciech Wegrzynski
Summary: This paper presents a heat transfer model for calculating the temperature field inside thin walled sections in fire, considering non-uniform heat exposure and arbitrary shape of the cross-section, resulting in a non-uniform temperature field. The model takes into account the practical abilities for measuring heat exposures in experiments and numerical fire simulations, and is verified by comparison to 2D finite element method solution and validation using experimental data.
THIN-WALLED STRUCTURES
(2021)
Article
Chemistry, Physical
Caihong Li, Long Shi, Xudong Cheng, Song Lu, Yuelei Pan, Heping Zhang
Summary: Due to the restriction of using Halon 1301 for fire suppression, alternative substances including HFC-125, 2-BTP, and Novec1230 have been developed. However, these alternatives were found to promote combustion and overpressure in the FAA-ACET test, thus not suitable for aircraft cargo compartments. In this study, different blend ratios of 2-BTP and HFC-125 were used to investigate their inhibitory effects on combustion enhancement. The results showed that the blend ratios of 25/75 and 50/50 effectively reduced heat release and system reactivity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Multidisciplinary
Rahul Kallada Janardhan, Saani Shakil, Marko Hassinen, Wei Lu, Jari Puttonen, Simo Hostikka
Summary: The feasibility of using coupled CFD and FE simulations to aid firefighting tactics and structural cooling was investigated. Experimental and simulation results showed that spray cooling can reduce temperatures and halt truss deformation.
Article
Construction & Building Technology
Yang Zhou, Fei Chen, Zhongyang Geng, Rongwei Bu, Weixuan Gong, Chuangang Fan, Liang Yi
Summary: This study investigated the combustion characteristics and temperature distribution of two pool fires in a tunnel, finding that the mass loss rate is influenced by the spacing and transverse distance between the fire sources. A prediction model was developed to describe these influences, providing valuable insights for assessing the risk of tunnel fires with two fire sources.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Rongliang Pan, Guoqing Zhu, Gang Xu, Xin Liu
Summary: The study investigated the influence of a curved ceiling and fire location on combustion characteristics in a utility tunnel by analyzing burning rate and temperature profile produced by a pool fire beneath a curved ceiling. Results showed that oxygen supply and heat feedback compete to determine the evolution of the burning rate. A qualitative analysis was conducted to elucidate this competitive mechanism.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Vinay, S. Raja, S. M. Tauseef, Surendar Varadharajan
Summary: This study investigates the effects of varying oxygen concentrations on fire dynamics in a hospital environment and finds that higher oxygen concentrations lead to earlier flashover occurrence, as well as higher temperatures and thermal intensity. These findings provide valuable insights for the development of effective fire safety management systems in hospitals.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Construction & Building Technology
Jiaqiang Han, Pengqiang Geng, Zihao Wang, Fei Wang, Miaocheng Weng, Fang Liu
Summary: The study focused on pool fire behavior in a naturally ventilated tunnel with blockages, finding that blockages near the fire can lead to asymmetrical fire plume entrainment and affect flame behavior. Additionally, a decrease in fire-blockage distance was linked to a significant increase in burning rate of the pool fire and a decrease in ceiling temperature.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)