Equation of state for aluminum in warm dense matter regime

Wang, Kun; Zhang, Dong; Shi, Zongqian; Shi, Yuanjie; Wang, Tianhao; Zhang, Yue

doi:10.1088/1674-1056/28/1/016401

Cited by 5 publications

(2 citation statements)

References 38 publications

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“…The China Academy of Engineering Physics established the semiempirical wide-regime EOS, which is in good agreement with theoretical and experimental results [111]. The multi-phase wide-range EOS model was also studied and used in different works [114][115][116][117][118].…”

Section: Eos and Conductivity Datasupporting

confidence: 68%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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The underwater electrical wire explosion (UEWE) is an appealing source of underwater shock waves (SWs) with a high conversion efficiency from electrical energy to mechanical energy, good repeatability and controllability. Industrial applications are already seen in oil-well unblocking and stratum stimulation, and research is currently underway to apply UEWEs in electro-hydraulic forming, exploitation of unconventional gas and oil resources, etc. The emerging new applications call for a review on UEWE research from the perspective of an efficient SW source. This review paper considers the physical processes and numerical simulation methods, electrical and SW characteristics, and current and potential applications, and provides suggestions for future research directions. The code (XJ_UEWE01) developed by the authors to solve a coupling model of UEWE is included. The paper will provide students and researchers new to this field with an explanation of basic concepts of UEWE and a detailed overview of previous studies, and will aid research on UEWE applications, especially device development and parameter optimization.

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Section: Eos and Conductivity Datasupporting

confidence: 68%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

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“…equation of state and transport coefficient, which primarily govern the behavior of exploding products. A semi-empirical equation of state is applied in this simulation, accounting for phase transition of metal wire from solid state to plasma state [17]. Two-temperature treatment of plasma fluid describes the dynamics of electrons and ions separately.…”

Section: Code Description and Physical Property Parametersmentioning

confidence: 99%

Numerical simulation on the formation and merging of ablation plasma in two exploding aluminum wires

Wang¹,

Zhang²,

Jiang³

et al. 2020

J. Phys. D: Appl. Phys.

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In this paper, computational results characterizing the formation and merging of counter-streaming interpenetrating plasma flows formed in exploding double parallel aluminum wires are presented. A radial magnetohydrodynamic computation is carried out first to obtain the parameters of core-corona structure in individual wires, providing an initial condition for the planar magnetohydrodynamic model in a multi-species fluids scheme with two-temperature treatment of plasma. In the XY plane, two aluminum plasma clouds are surrounded by extremely thin air, which represents a vacuum environment. A long-lasting compressed layer of extremely thin air in the central region of the inter-wire gap is formed before the merger of aluminum plasma flows. The accordance between the increasing mass fraction of aluminum plasma species in the central slit and the enhancement in self-emission light demonstrates that the real physical characteristics of extremely low-density vacuum environment plays an important role in merger of aluminum plasma flows. Current density is concentrated in the central column during the merging process of counter-streaming interpenetrating aluminum plasma flows, evolving from a structure of bifurcated current sheets into a single narrow sheet. Efficient numerical investigation on the interaction between counter-streaming plasma flows requires the incorporation of surrounding fluid species of extremely thin air.

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Stratification and filamentation instabilities in the dense core of exploding wires

Wang

Shi

et al. 2020

Physics of Plasmas

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We report experiments characterizing the stratified and filamentary structures formed in the dense core of nanosecond electrical explosion of aluminum wires to understand the physical scenario of electrothermal instability. Direct experimental observations for stratification and filamentation instabilities, as well as the coexistence state of azimuthal strata and vertical filament in the dense plasma column, are presented. The wire core exhibits remarkable different patterns of instability with the decreasing wire length. The shadowgram of shorter wires demonstrates that the instability is transformed from stratified structures to filamentary structures. According to a radial magnetohydrodynamic computation, the wire enters a phase state of negative temperature dependence of resistivity before voltage breakdown. However, filamentary structures are only observed in exploding wires of 1 cm and 0.5 cm in length. The analyses based on experimental and computational results indicate that the increase in internal energy determines the manifestation of instability in the dense core. Filamentation instability occurs when the total energy input is no less than 1.5 times the vaporization energy at the moment of voltage breakdown. The lower limit of energy deposition ensures that the increase in internal energy covers vaporization energy.

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Equation of state for aluminum in warm dense matter regime

Cited by 5 publications

References 38 publications

Electrical wire explosion as a source of underwater shock waves

Electrical wire explosion as a source of underwater shock waves

Numerical simulation on the formation and merging of ablation plasma in two exploding aluminum wires

Stratification and filamentation instabilities in the dense core of exploding wires

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