Heat transfer to bodies engulfed in di-tert-butyl peroxide pool fires - Numerical simulations

Siddapureddy, Sudheer; Wehrstedt, Klaus‐Dieter; Prabhu, S.V.

doi:10.1016/j.jlp.2016.09.008

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…Then the mass burning rate can be calculated as , where h v is the latent heat of vaporization; c p,l is the specific heat of liquid fuel; T l,b and T l,0 are the boiling point and initial temperature of liquid fuel, respectively; ṁ ∞ is the burning rate for pool fire with an infinite diameter. For a heptane pool fire, the values of ṁ ∞ and τ are found to be 0.101 kg·m –2 ·s –1 and 1.1 m –1 , respectively …”

Section: Heat Transfermentioning

confidence: 99%

“…In the process of production, storage, transportation, and application of liquid fuel (gasoline, diesel oil, crude oil, etc. ), the accidental leakage can lead to pool fire upon the ignition sources. − Pool fire has the characteristics of longer duration and stronger heat radiation hazard, which possibly brings serious damage to the surrounding environment. − Therefore, the study of the combustion characteristics of pool fire is beneficial to fire risk assessment and fire safety and also promotes the safe application of energy.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study of Combustion Characteristics of Circular Ring Thin-Layer Pool Fire

et al. 2017

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For clarifying the combustion behavior of a circular ring thin-layer pool fire, a series of experiments with varying pool diameters were carried out. The equivalent pool area of 0.071 m 2 and an initial n-heptane thickness of 10 mm were fixed. An electronic balance, a digital camera, and K-type thermocouples were used to measure burning rate, flame height, and centerline temperature, respectively. The results show that more burning stages can appear with the increase of the inner and outer diameters of the circular ring pool. Fire merging can occur at any one of the stages of initial growth, quasi-steady burning with surface boiling, transition to bulk boiling, and bulk boiling burning; moreover, the maximum burning rate of fire merging is about 3.5 times that of the ordinary pool fire with the same area. The core hollow region plays an important role in decreasing the burning rate, flame height, fire merging time, etc. The evolutions of the characteristic parameters, e.g., burning rate, flame height, and centerline temperature, were analyzed. New correlations for predicting these parameters were also proposed.

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Section: Heat Transfermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study of Combustion Characteristics of Circular Ring Thin-Layer Pool Fire

et al. 2017

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“…More recently, Sun et al (Sun et al (2015), Sun and Guo (2013)) provided a dynamic LNG pool fire simulation to estimate mitigation through high expansion foam at different burning times. Several authors proposed pool fire simulations to analyze the potential occurrence of cascading events (e.g., Bainbridge and Keltner (1988), Masum Jujuly et al (2015), Siddapureddy et al (2016)). However, they focused on the determination of the thermal loads distribution on the outer surface of the vessels engulfed by the flames (Siddapureddy et al (2016)) or exposed to distant source radiation (Masum Jujuly et al (2015)), while the complex behavior of the tank lading was not taken into account.…”

Section: Introductionmentioning

confidence: 99%

Coupling of integral methods and CFD for modeling complex industrial accidents

Rum

Landucci

Galletti

2018

Journal of Loss Prevention in the Process Industries

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Safety enhancement of operations in the chemical and petrochemical industry requires for advances in the tools aimed at supporting risk estimation and evaluation. In conventional risk studies, consequence assessment is carried out through simplified tools and conservative assumptions, often resulting in overestimation of accident severity and worst-case scenarios. Computational Fluid Dynamics (CFD) may overcome the limitation of simplified approaches supporting the study of the dynamic evolution of accidental scenarios and, eventually, the consequences analysis of major accidents. However, the complexity of the problem makes the simulations too computationally demanding; hence an interesting approach is to couple simplified tools based on integral models and CFD. This work is aimed at modeling a safety critical scenario, i.e. domino effect triggered by fire. An integral model is adopted to reproduce a large-scale pool fire, thus simulating the radiative heat received by an exposed pressurized vessel. The behavior of the latter is then modeled through CFD, to investigate the heat-up process and the consequent pressure build up. Potential benefits and limitations of coupling distributed and integral models to support consequence assessment studies are discussed

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“…[7,[14][15][16] Experimentally measured variables include the influence of (a) various pool sizes, [17] (b) relative humidity, (c) wind speed, and (d) ambient pressure. [18][19][20][21][22][23] The solid flame modelling (SFM) approach is used for predicting the burning characteristics of stand-alone (single) small-scale pool fires (less than 1 m pool). [5,24] The mathematical modelling of MPF relies on various correlations for estimating mass burning rate, flame height, flame tilt, and heat release rate.…”

mentioning

confidence: 99%

Numerical prediction of fire dynamics and the safety zone in large‐scale multiple pool fire in a dike using flamelet model

Nemalipuri,

Singh,

Vitankar

et al. 2023

Can J Chem Eng

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This research aims to develop a computational fluid dynamics (CFD) methodology for estimating the safety zone around a dike with multiple pool fire (MPF). This study predicts the safety zone and burning characteristics of heptane MPF inside a square dike in calm wind and worst‐case crosswind situations using unsteady simulations. The heptane MPF is modelled using flamelet approach with large eddy simulation (LES) turbulence model incorporating the soot generation. Discrete ordinates and Moss–Brookes model estimate the effect of participating medium radiation on prediction of safety distance and soot production. The discretization is incorporated using an isotropic trimmed cell mesher with local refinement to resolve the flame characteristics in Simcenter STAR CCM+. An extensive grid‐independence study has been executed to find the optimal mesh. The flame temperature and O2 and CO2 mass fraction predictions in calm wind conditions are in good agreement with the experimental findings of Koseki and Yumoto and the maximum flame temperature predictions are within 2.8% error. The safety zone is predicted using the estimated radiative heat flux. The effect of different ordinate sets (angular discretization S4, S6, and S12) approach on safety distance prediction is investigated. The validated grid independent CFD model combined with flamelet generated manifold model and LES turbulence model is proposed to predict the safety zone for industrial MPF in crosswind scenarios, thereby preventing human fatalities and property loss.

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Heat transfer to bodies engulfed in di-tert-butyl peroxide pool fires - Numerical simulations

Cited by 10 publications

References 18 publications

Experimental Study of Combustion Characteristics of Circular Ring Thin-Layer Pool Fire

Experimental Study of Combustion Characteristics of Circular Ring Thin-Layer Pool Fire

Coupling of integral methods and CFD for modeling complex industrial accidents

Numerical prediction of fire dynamics and the safety zone in large‐scale multiple pool fire in a dike using flamelet model

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