Simulation of converging cylindrical GPa-range shock waves generated by wire array underwater electrical explosions

Bazalitski, G.; Gurovich, V. Tz.; Fedotov-Gefen, A.; Efimov, S.; Krasik, Ya. E.

doi:10.1007/s00193-011-0320-4

Cited by 22 publications

(9 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 1D HD simulations of SSW implosion were based on a model described in detail in Ref. 6 with modification described in Ref. 11, namely, a thin "Cu layer" was considered.…”

Section: Experimental and 1d Hd Modeling Resultsmentioning

confidence: 99%

“…The time interval between the beginning of this light emission and the maximum of the discharge current (the starting point of the SSW's generation) defines the Time-Of-Flight (TOF) of the SSW. To estimate the water flow parameters, one Dimensional (1D) Hydrodynamic (HD) simulations 6 using the Equations of State (EOS) of copper, 7 water, 7 and glycerol, [8][9][10] were performed. The simulation assumes uniformity of the SSW convergence, includes a fitting parameter to the measured TOF, and requires that the total energy in the converging water flow is 12% of the energy delivered to the exploding wires.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of electrical explosions of spherical wire arrays in water and glycerol on different timescales

et al. 2018

Self Cite

View full text Add to dashboard Cite

Results of underwater electrical explosions of spherical wire arrays in water and glycerol on the sub-microsecond timescale are presented and compared to those obtained on the microsecond timescale [Rososhek et al., Phys. Plasmas 24, 122705 (2017)]. The time-of-flight of the converging shockwave was found to be approximately the same, despite almost three times faster energy density deposition into the exploding wires for sub-microsecond timescale explosions. This phenomenon was reproduced by numerical modeling, which showed that the exploding wires' expansion on both timescales results in almost identical radii when the convergence of the shockwave becomes self-similar. Thus, to increase the shockwave convergence velocity and consequently, the parameters of the compressed water near the shockwave implosion origin, instead of increasing the energy deposition rate, one must increase the initially stored energy.

show abstract

“…The 1D HD simulations of SSW implosion were based on a model described in detail in Ref. 6 with modification described in Ref. 11, namely, a thin "Cu layer" was considered.…”

Section: Experimental and 1d Hd Modeling Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of electrical explosions of spherical wire arrays in water and glycerol on different timescales

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…The 1D HD simulations were based on the code described in Fedotov-Gefen et al (2011) and Bazalitski et al (2011) with some modifications. The issue of the consistency of 1D dimension assumption was addressed in Fedotov et al (2007), where results of two-dimensional (2D) and 1D HD simulations are presented and where it was also demonstrated that, in the case of arrays with a large number of wires (>20), 1D calculations can be successfully employed for numerical analysis.…”

Section: Simulations' Results Of Cu and Al Wire Array Explosionsmentioning

confidence: 99%

Modified wire array underwater electrical explosion

et al. 2012

Self Cite

View full text Add to dashboard Cite

The results of experiments involving underwater electrical explosion of different wire arrays using an outer metallic cylinder as a shock reflector are presented. A pulse generator with a stored energy of about 6 kJ, current amplitude ≤ 500 kA, and rise time of 350 ns was used for the wire array explosion. The results of the experiments and of hydrodynamic simulations showed that in the case of a Cu wire array explosion, the addition of the reflector increases the pressure and temperature of the water in the vicinity of the implosion axis about 1.38 and about 1.33 times, respectively. Also, it was shown that in the case of an Al wire array explosion with stainless steel reflector, Al combustion results, and, accordingly, additional energy is delivered to the converging water flow generating about 540 GPa pressure in the vicinity of the explosion axis. Finally, it was found that microsecond time scale light emission that appears with microsecond time scale delay with respect to the nanosecond time scale self-light emission of the compressed water in the vicinity of the implosion axis is related to water bubbles formation which scattered light of exploded wires.

show abstract

“…The latter could lead to a larger energy being delivered to the vicinity of the implosion origin, due to the smaller energy losses of the SSW during its implosion. 16 The experimental setup is shown in Fig. 1.…”

mentioning

confidence: 99%

“…Thus, the results of the present study confirmed one of the main conclusions of simulations. 16 Namely, despite a smaller energy being deposited into the wire array, one can obtain larger pressure in the vicinity of SSW implosion if a proper adjustment between the SSW TOF and energy deposition rate is achieved. To conclude, the ls timescale underwater electrical explosion of a spherical wire array using a generator with stored energy of only $3.6 kJ showed parameters of the extreme state of water in the vicinity of the implosion origin that were superior to those obtained in sub-ls time scale experiments, due to the additional input of magnetic gradient force.…”

mentioning

confidence: 99%

Generation of converging strong shock wave formed by microsecond timescale underwater electrical explosion of spherical wire array

Antonov

Efimov

Yanuka

et al. 2013

Applied Physics Letters

Self Cite

View full text Add to dashboard Cite

A study of generation of converging strong shock wave using microsecond underwater electrical explosion of spherical Cu-wire array is presented. Hydrodynamic simulations coupled with the equation of state for Cu and water, deposited energy, and the magnetic pressure were used to calculate the water parameters in the vicinity of the implosion origin. The results of simulations agree with the shock wave time-of-flight and energy delivered to the water flow and show that in the vicinity (diameter of $12 lm) of an implosion one can expect water pressure of $6 TPa, temperature of $17 eV, and compression of $8. V C 2013 American Institute of Physics.

show abstract

Simulation of converging cylindrical GPa-range shock waves generated by wire array underwater electrical explosions

Cited by 22 publications

References 24 publications

Comparison of electrical explosions of spherical wire arrays in water and glycerol on different timescales

Comparison of electrical explosions of spherical wire arrays in water and glycerol on different timescales

Modified wire array underwater electrical explosion

Generation of converging strong shock wave formed by microsecond timescale underwater electrical explosion of spherical wire array

Contact Info

Product

Resources

About