Cylindrical blast wave propagation in an enclosure

Bagabir, Ahmed M.

doi:10.1007/s00193-012-0406-7

Cited by 7 publications

(9 citation statements)

References 11 publications

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“…The justification for the common use of Euler equations to model shock waves is that the compressible flow is mostly subject to convective effects. 6 This is due to the fact that the viscous effects are concentrated only in the boundary layer adjacent to the solid surfaces. 6 The Euler equations can be written in matrix form and the two curvilinear co-ordinates, ξ and ζ, as:…”

Section: Problem Definitionmentioning

confidence: 99%

“…6 This is due to the fact that the viscous effects are concentrated only in the boundary layer adjacent to the solid surfaces. 6 The Euler equations can be written in matrix form and the two curvilinear co-ordinates, ξ and ζ, as:…”

Section: Problem Definitionmentioning

confidence: 99%

“…Blast wave reflections from rigid structures can magnify the overpressures many times over. [6][7][8] A mosque building as a confined space can greatly complicate the development of a blast wave. The interaction between the aforementioned mechanisms is complex, and several past studies have tried to shed light on the problem.…”

Section: Introductionmentioning

confidence: 99%

“…The interaction between the aforementioned mechanisms is complex, and several past studies have tried to shed light on the problem. [6][7][8][9] Analysis has demonstrated that confinement of explosions results in more serious injuries. [10][11][12] Conducting scientific experiments on shock waves to investigate their impact on buildings is immensely difficult.…”

Section: Introductionmentioning

confidence: 99%

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Modeling the Effects of Mosque Explosion on Prayers

Bagabir

2024

Yanbu Journal of Engineering and Science

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Mosques are temples for Muslims in which five prayers are held a day. The continuous escalation of terrorist threats in general and on mosques, in particular, necessitates the importance of protecting people and infrastructure from the burdens of malicious deliberate bombings. The consequences of the blast overburdens are catastrophic, including injuries, deaths, material and economic losses, and social upheaval. The current research employed numerical simulation to investigate the influence of an intentionally induced explosion in a confined, densely populated space on expected human casualties. The case study is a typical mosque building with an area of 600 square meters. Its maximum capacity is 720 prayers (Muslim worshipers), distributed in 12 rows, one behind the other. A detonation occurred as a result of a 1.15 kg TNT bomb exploding in the first row behind the Imam (leader of prayers). The time history of overpressure and speed was monitored at six different points. The four types of blast injuries, primary, tertiary, secondary, and quaternary, have been evaluated. The primary targets, the imam and prayers near the center of the explosion, are more likely to die from the tertiary blast injury. Prayers close to reflective walls, especially near the corners of the mosque, are at risk of death due to the primary blast injury. High winds have been found to cause more severe tertiary injuries than primary injuries resulting from blast overpressure. The information presented in this paper is useful for assessing post-blast damage and for estimating potential blast hazards from explosions. Appropriate design and provision of emergency exits can reduce the rates of physical injury and death resulting from explosions.

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Section: Problem Definitionmentioning

confidence: 99%

Section: Problem Definitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling the Effects of Mosque Explosion on Prayers

Bagabir

2024

Yanbu Journal of Engineering and Science

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“…It has been found that the numerical solutions of the inviscid solver reproduce accurately shock propagations, reflections, and interactions. [1][2][3][4][5][6] This is because the compressible flows have inviscid characteristics. It was also shown that there is no difference between the flow features based on the inviscid and laminar solvers applied to shock wave diffraction over the backward-facing step.…”

Section: Introductionmentioning

confidence: 99%

Numerical Experiments and Analysis of Shock Wave Diffraction around Structures

Bagabir

Abutaleb

2021

Yanbu Journal of Engineering and Science

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Flows with adverse pressure gradients are more challenging to simulate numerically due to the boundary layer separation. However, the computational fluid dynamics have been used successfully to improve the understanding of the complex fluid dynamics of the transient shock-induced shear layers. The present research tries to investigate the eligibility of the inviscid, viscous (laminar), and turbulent solvers to find which ones reveal realistic results and agree best with the experiments. The solvers are based on the Euler, the Navier-Stokes equations, and the Reynolds averaged Navier-Stokes equations coupled with the SST turbulence model, respectively. A mesh-adaptive high-order AUSM+ numerical scheme is applied. A systematic validation is performed with three cases focusing on the mechanism of the shock wave diffraction and the behavior of the shear layer. They are shock wave diffraction over a backward-facing step, convex 8o sharp splitter, and curved splitter. The investigation reveals that it is crucial to apply a turbulent solver for flows with separation due to the adverse pressure gradient. The lack of viscosity is responsible for the deviation of the inviscid and laminar resolutions from experiments. Moreover, the CFD simulation reveals tiny details about the shock wave diffraction around curved structure not appear in the experimental schlieren and shadowgraph.

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Interaction of Shock Tube Generated Blast Wave with a Rectangular Object at Two Pressure Ratios: Numerical Simulations and Their Comparison

Kundu¹,

Thangadurai²

2023

Lecture Notes in Mechanical Engineering

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Cylindrical blast wave propagation in an enclosure

Cited by 7 publications

References 11 publications

Modeling the Effects of Mosque Explosion on Prayers

Modeling the Effects of Mosque Explosion on Prayers

Numerical Experiments and Analysis of Shock Wave Diffraction around Structures

Interaction of Shock Tube Generated Blast Wave with a Rectangular Object at Two Pressure Ratios: Numerical Simulations and Their Comparison

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