Shock Propagation Effects in Multilayer Assembly Including a Liquid Phase

Bourguille, Judith; Bergamasco, Luca; Tahan, Gilles; Fuster, Daniel; Арригони, М.

doi:10.4028/www.scientific.net/kem.755.181

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…α > π/2). The generation of bubbles with α > π/2 can be investigated using the set-up described briefly in Appendix B, and Bourguille et al (2017) and Tahan et al (2020). The laser is focused at the bottom of a liquid tank where a water drop is attached.…”

Section: Viscous Correctionmentioning

confidence: 99%

On the dynamics of a collapsing bubble in contact with a rigid wall

et al. 2022

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This work reveals that the dynamic response of a spherical cap bubble in contact with a rigid wall depends on the effective contact angle at the instant prior to collapse. This parameter allows us to discriminate between two regimes in which the mechanisms of interaction between the collapsing bubble and its surrounding medium differ significantly: when the contact angle is smaller than $90^{\circ }$ , a classical jet directed towards the wall is observed, whereas if the initial contact angle is larger than $90^{\circ }$ , an annular re-entrant jet parallel to the wall appears. We show that this change of behaviour can be explained using the impulse potential flow theory for small times, which shows the presence of a singularity on the initial acceleration of the contact line when the contact angle is larger than $90^{\circ }$ . Direct numerical simulations show that although viscosity regularises the solution at $t > 0$ , the solution remains singular at $t=0$ . In these circumstances, numerical and experimental results show that the collapse of flat bubbles can eventually lead to the formation of a vortex ring that unexpectedly induces long-range effects. The role of the bubble geometry at the instant of maximum expansion on the overall collapse process is shown to be well captured by the impulse potential flow theory, which can be generalised easily to other bubble shapes. These results may find direct application in the interpretation of geophysical flows as well as the control and design of biomedical, naval, manufacturing and sonochemistry applications.

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Section: Viscous Correctionmentioning

confidence: 99%

On the dynamics of a collapsing bubble in contact with a rigid wall

et al. 2022

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“…In order to characterize the pressure profile induced by the laser-matter interaction of the ENSTA Bretagne pulsed laser, shots on 1 mm and 2 mm thick aluminum plates were performed with PDV records of the free surface velocity with the same experimental setup presented in paragraph 2.2. This procedure is detailed in [20]. These tests provide a basis of comparison for validating the laser-matter interaction models.…”

Section: Laser Shock Wave Characterisationmentioning

confidence: 99%

Laser Induced Shockwave as Delaminator of Composite Material for Ballistic Protection at High Strain Rate

Alil¹,

Арригони²,

Istrate³

et al. 2020

NATO Science for Peace and Security Series C: Environmental Security

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Societal concerns on security push light weight armor for ballistic protection to remain a topic of interest. Ultra-High Molecular Weight Polyethylene composites (UHMWPE) have shown appreciable performances for ballistic protection, because of their ability to mitigate kinetic energy of projectiles by various mechanisms of dissipation and because of their lower density. Among dissipative mechanisms of interest, delamination is one of them. In order estimate the bond strength between two plies, the laser induced shock wave technique has been utilized on Tensylon® thin panels. Firstly, this paper introduces this technique and its capabilities with respect to the characterization of ballistic protections at very high strain rates (10 6 s À1 ). Secondly, a set of experimental results is shown and interpreted to obtain the interply bond strength, through the spallation process. At last, experimental results are supported by a numerical model that is in the verge of being a predictive tool.

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“…The solver uses a cell-centered volume of fluid (VOF) approach [5] for the numerical résolution on isotropic octree/quadtree meshes. The current AMR method is meant to improve the accuracy of resolution namely when dealing with multi-scale problems with or w/o singularities or multi-phase flows [4].…”

mentioning

confidence: 99%

Metric-Based Adaptive Mesh Refinement and Flux Error in CFD Problems

Prouvost¹,

Belme²,

Fuster³

2021

10th International Conference on Adaptative Modeling and Simulation

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The present conference paper discusses a new adaptive mesh refinement (AMR) method implemented in our in-house open-source solver Basilisk [2]. The solver uses a cell-centered volume of fluid (VOF) approach [5] for the numerical résolution on isotropic octree/quadtree meshes. The current AMR method is meant to improve the accuracy of resolution namely when dealing with multi-scale problems with or w/o singularities or multi-phase flows [4].

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Shock Propagation Effects in Multilayer Assembly Including a Liquid Phase

Cited by 5 publications

References 16 publications

On the dynamics of a collapsing bubble in contact with a rigid wall

On the dynamics of a collapsing bubble in contact with a rigid wall

Laser Induced Shockwave as Delaminator of Composite Material for Ballistic Protection at High Strain Rate

Metric-Based Adaptive Mesh Refinement and Flux Error in CFD Problems

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