Collision of convex objects for calculation of porous mesh in gas explosion simulation

Ferreira, Tatiele Dalfior; Vianna, Sávio S.V.

doi:10.1016/j.jlp.2020.104347

Cited by 8 publications

(2 citation statements)

References 6 publications

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“…[17] Further details of the code can be found elsewhere. [18,19] We now turn our attention to combustion modelling. The combustion source term is modelled in accordance with the following expression:…”

Section: Shock Towards Kinetic Explosion Simulation (Stokes)mentioning

confidence: 99%

Computational modelling of explosions caused by failed Li‐ion batteries

2023

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The implementation rate of renewable energy sources such as lithium‐ion batteries has grown over the last decade. Consequently, the number of explosion occurrences associated with these batteries has also increased. Such events are due to a process called thermal runaway (TR). The flamelet combustion approach has been widely used to model premixed combustion. However, its applicability for modelling accidental explosions from lithium‐ion batteries remains limited. Moreover, the effects and contributions from stress, strain, and wrinkling on the flame front in gas mixtures from Li‐ion batteries are not fully understood. As far as computational modelling is concerned, the same effects require further investigation. The current research investigates the performance of the flamelet approach for modelling premixed combustion scenarios caused by the gases ejected by a fully charged lithium‐ion‐phosphate (LFP) battery. A new laminar burning velocity correlation is proposed based on experimental data to calculate overpressure, flame position, and flame velocity in a semi‐confined geometry. Promising results are presented resorted by good agreement with experimental data.

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Section: Shock Towards Kinetic Explosion Simulation (Stokes)mentioning

confidence: 99%

Computational modelling of explosions caused by failed Li‐ion batteries

2023

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“…The safety distance from a vapor cloud rapid deflagration was investigated by Li and Hao [7] using a numerical tool. In the context of a gas cloud, numerical simulations in environments with complex geometry were performed by Vianna and Cant [8], Ferreira and Vianna [9], [10], and Quaresma et al [11]. These researchers used a computational tool with meshes based on Porosity Distributed Resistance (PDR).…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the explosion of gas tanks using computational fluid dynamics

Moura

Neto

Doz

2023

Rev. IBRACON Estrut. Mater.

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Buildings are composed of several systems, each with specific designs and regulations to ensure that constructions are safe and viable. Many residential, commercial, and industrial buildings have systems with gas central storage, which must be subjected to strict safety criteria to avoid accidents. In addition to the safety mechanisms provided by manufacturers, designers of these gas central storage must consider other devices to reduce explosion risk and mitigate the damaging blast effects. Explosions are physical-chemical phenomena that are characterized by the sudden expansion of a material and, consequently, energy release. When an accidental explosion occurs, much damage is caused by the shock wave and fragments. In the case of pressure vessels, a mechanical explosion can occur. Studying this explosion is essential to developing a more reliable, safe design for surrounding buildings and its users. This work aims to study the effects of gas tank explosions. In this study, the Autodyn computational tool based on fluid dynamics (CFD) is used. This software allows the modeling of complex explosion scenarios and the evaluation of blast wave parameters. For each numerical model, the overpressure levels outdoors and indoors are evaluated. The results indicated how the wave overpressures are distributed in different scenarios, and from them, it was possible to analyze the damaging levels.

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