Influence of water conductivity on shock waves generated by underwater electrical wire explosion

Liu, Ben; Wang, Deguo; Guo, Yanbao

doi:10.1016/j.physleta.2017.10.039

Cited by 23 publications

(8 citation statements)

References 16 publications

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“…Underwater electrical wire explosions have drawn much attention for the last 60 years due to their use in exploring the Equations of State (EOS) and electrical conductivity of materials, and for potential industrial applications including mining and fracking for the petroleum industry. [1][2][3][4][5][6][7] Due to a high electric field breakdown threshold in water (>200 kV/cm), plasma formation along the wire's surface, which dominates wire explosions in vacuum or gas, is prevented. Furthermore, water's small compressibility allows one to keep high energy density deposition into the exploding wire.…”

Section: Introductionmentioning

confidence: 99%

Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Yanuka

Rososhek

Theocharous

et al. 2018

Journal of Applied Physics

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We present the first use of synchrotron-based phase contrast radiography to study pulsed-power driven high energy density physics experiments. Underwater electrical wire explosions have become of interest to the wider physics community due to their ability to study material properties at extreme conditions and efficiently couple stored electrical energy into intense shock waves in water. The latter can be shaped to provide convergent implosions, resulting in very high pressures (1-10 Mbar) produced on relatively small pulsed power facilities (100s of kA-MA). Multiple experiments have explored single-wire explosions in water, hoping to understand the underlying physics and better optimize this energy transfer process; however, diagnostics can be limited. Optical imaging diagnostics are usually obscured by the shock wave itself; and until now, diode-based X-ray radiography has been of relatively low resolution and rather a broad x-ray energy spectrum. Utilising phase contrast imaging capabilities of the ID19 beamline at the European Synchrotron Radiation Facility, we were able to image both the exploding wire and the shock wave. Probing radiation of 20-50 keV radiographed 200 μm tungsten and copper wires, in ∼2-cm diameter water cylinders with resolutions of 8 μm and 32 μm. The wires were exploded by a ∼30-kA, 500-ns compact pulser, and 128 radiographs, each with a 100-ps X-ray pulse exposure, spaced at 704 ns apart were taken in each experiment. Abel inversion was used to obtain the density profile of the wires, and the results are compared to two dimensional hydrodynamic and one dimensional magnetohydrodynamic simulations.

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Section: Introductionmentioning

confidence: 99%

Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Yanuka

Rososhek

Theocharous

et al. 2018

Journal of Applied Physics

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“…The latter enables resistive heating to continue efficiently, while the expansion of the wire also drives a strong shock wave through the water, which itself can be used to access high pressure conditions. [5][6][7][8] Monitoring of the current through and voltage across exploding wires has long been used as a basis for resistivity measurements in warm dense matter conditions. However, understanding how the wire expands is crucial to the interpretation of this research.…”

mentioning

confidence: 99%

X-ray radiography of the overheating instability in underwater electrical explosions of wires

et al. 2019

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We present the measurements of the development of striation like instabilities during the electrical driven explosions of wires in a water bath. In vacuum based wire explosion experiments, such instabilities have long been known. However, in spite of intense research into the explosion of wires in liquids, the development of these instabilities has either not been observed or has been assumed to play a minor role in the parameters of the exploding wire due to the tamping of the wire's explosion. Using synchrotron based multiframe radiography, we have seen the development of platelike density structures along an exploding copper wire. Our measurements were compared to a 2D magnetohydrodynamics simulation, showing similar striation formation. These observed instabilities could affect the measurements of the conductivity of the wire material in the gas-plasma state-an important parameter in the warm dense matter community. The striations could also act as a seed for other instabilities later in time if the wire is in a dense flow of material or experiences a shock from an adjacent wire-as it would do in experiments with arrays of wires.

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“…The presence of ions dissolved in an aqueous medium, generates the electrical conductivity of the water, caused by the presence of dissolved substances, mainly salts, coming from the contact of the water medium with soils, sediments and rocks, which dissociate in anions and cations, translate the water capacity to conduct the electric current, characterizing the presence of minerals that, when following the limits established by resolutions, such as CONAMA 357 and updated by CONAMA 430, for example, may guarantee water of excellent quality (CONAMA, 2011;CONAMA, 2005;LIU et al, 2018;MIRLEAN et al, 2002;MIRLEAN et al, 2005).…”

Section: Water Treatment Processesmentioning

confidence: 99%

Remoção De Cromo Hexavalente Presente Em Soluções Sintéticas Diluídas Empregando Carvão Ativado Comercial E Carvão Vegetal Produzido a Partir Da Casca De Arroz

Ries¹,

Silveira²

2019

Princípios De Química

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Influence of water conductivity on shock waves generated by underwater electrical wire explosion

Cited by 23 publications

References 16 publications

Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

Multi frame synchrotron radiography of pulsed power driven underwater single wire explosions

X-ray radiography of the overheating instability in underwater electrical explosions of wires

Remoção De Cromo Hexavalente Presente Em Soluções Sintéticas Diluídas Empregando Carvão Ativado Comercial E Carvão Vegetal Produzido a Partir Da Casca De Arroz

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