A priori validation of CFD modelling of hydrocarbon pool fires

Rengel, B.; Mata, Christian; Pastor, Elsa; Casal, Joaquim; Planas, Eulàlia

doi:10.1016/j.jlp.2018.08.002

Cited by 31 publications

(29 citation statements)

References 28 publications

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“…having a range of values. The boiling temperatures used here are taken from the work of Rengel et al (2018) and have been used to ensure consistency across the two studies. However, it is expected that the burning rates for the gasoline and diesel fires modelled here will be under and over predicted, respectively.…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…Heat transfer from this 'hot block' to the fuel surface enables the fuel temperature to increase above its boiling point, leading to fuel vaporisation and subsequent combustion in the model. This approach is similar to that used in the work of Sikanen and Hostikka (2017) and Rengel et al (2018). A 10 kW propane burner was used as the ignition mechanism for the Pretrel 2005) tests with the flame seen to spread from the ignition location to cover the entire pool surface shortly after the start of each test.…”

Section: Modelling Fuels and Fuel Ignitionmentioning

confidence: 99%

“…Numerical modelling studies of this type have typically focussed on assessing other aspects of the models, such as the performance of heat, ventilation and air conditioning (HVAC) sub-models (Wahlqvist and van Hees, 2013;Beji et al, 2013Beji et al, , 2014, the choice of gas-phase combustion model (Wen et al, 2007;Stewart and Kelsey, 2017), or the turbulence closure model used in combination with the hydrodynamic solver (Vasanth et al, 2013). Where studies have considered the capability of models to predict fuel vaporisation rates for pool fires, the work has often been limited to fuel mass loss rates during the quasi-steady burning regime (Hostikka et al, 2002;Rengel et al, 2018). A number of authors have presented comparison of transient burning rate predictions to measured data (Suard et al, 2013;Wahlqvist and van Hees, 2016;Hostikka, 2016, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The present study seeks to expand on the work of Rengel et al (2018) by evaluating the ability of the Fire Dynamics Simulator (FDS) v6.7.0 to predict temporal variations in liquid pool fire fuel mass loss rates. The scenarios considered involve open atmosphere fires with ethanol and a variety of liquid hydrocarbons as fuels.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of CFD simulations of transient pool fire burning rates

Stewart

Phylaktou

Andrews

et al. 2021

Journal of Loss Prevention in the Process Industries

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Fire is the most commonly occurring major accident hazard in the chemical and process industries, with industry accident statistics highlighting the liquid pool fire as the most frequent fire event. Modelling of such phenomena feeds heavily into industry risk assessment and consequence analyses. Traditional simple empirical equations cannot account for the full range of factors influencing pool fire behaviour or increasingly complex plant design. The use of Computational Fluid Dynamics (CFD) modelling enables a greater understanding of pool fire behaviour to be gained numerically and provides the capability to deal with complex scenarios.This paper presents an evaluation of the Fire Dynamics Simulator (FDS) for predictive modelling of liquid pool fire burning rates. Specifically, the work examines the ability of the model to predict temporal variations in the burning rate of open atmosphere pool fires. Fires ranging from 0.4 to 4 m in diameter, involving ethanol and a range of liquid hydrocarbons as fuels, are considered and comparisons of predicted fuel mass loss rates are compared to experimental measurements.The results show that the liquid pyrolysis sub-model in FDS gives consistent model performance for fully predictive modelling of liquid pool fire burning rates, particularly during quasi-steady burning. However, the model falls short of predicting the subtleties associated with each phase of the transient burning process, failing to reliably predict fuel mass loss rates during fire growth and extinction. The results suggest a range of model modifications which could lead to improved prediction of the transient fire growth and extinction phases of burning for liquid pool fires, specifically, investigation of: ignition modelling techniques for high boiling temperature liquid fuels; a combustion regime combining both infinite and finite-rate chemistry; a solution method which accounts for two-or three-dimensional heat conduction effects in the liquid-phase; alternative surrogate fuel compositions for multi-component hydrocarbon fuels; and modification of the solution procedure used at the liquid-gas interface during fire extinction.

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Section: Boundary Conditionsmentioning

confidence: 99%

Section: Modelling Fuels and Fuel Ignitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of CFD simulations of transient pool fire burning rates

Stewart

Phylaktou

Andrews

et al. 2021

Journal of Loss Prevention in the Process Industries

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“…Rengel et al [103] Pool Diesel/Gasoline L FDS/FLACS ✓ ✓ ✓ ✓ ✓ Qualitative/ Quantitative Davidy [104] Jet Heptane…”

Section: Measurements Cmentioning

confidence: 99%

Computational fluid dynamics modelling of hydrocarbon fires in open environments: Literature review

et al. 2020

Self Cite

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Hydrocarbon fuels are involved in most major fire accidents occurring in industrial facilities. Due to the need for an in-depth understanding of the phenomena associated with hydrocarbon fires, computational fluid dynamics (CFD) modelling has been widely employed in the field of fire risk analysis over the last decades. The aim of the present review is to provide the reader with a comprehensive compilation and discussion of the most important aspects involving CFD modelling to simulate hydrocarbon fires in open environments. The fire sizes simulated, the fuels used, the codes employed, the variables of interest measured, the simulation purposes and the results accuracy have been examined through a wide literature survey, which includes peerreviewed journals and congress papers dating from the 90s until now.

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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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A priori validation of CFD modelling of hydrocarbon pool fires

Cited by 31 publications

References 28 publications

Evaluation of CFD simulations of transient pool fire burning rates

Evaluation of CFD simulations of transient pool fire burning rates

Computational fluid dynamics modelling of hydrocarbon fires in open environments: Literature review

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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