Experiments and Simulations of Exploding Aluminum Wires: Validation of ALEGRA-MHD

Doney, Robert; Vunni, George B.; Niederhaus, John

doi:10.21236/ada565356

Cited by 5 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, the calculation domain is divided into EP and water with a clear interface, and the MHD equation set is solved under Lagrangian coordinates. In some research, general-purpose MHD codes such as JULIA [97] and ALE-GRA [98] were used to study the UEWE process.…”

Section: Numerical Modellingmentioning

confidence: 99%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

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.

show abstract

Section: Numerical Modellingmentioning

confidence: 99%

Electrical wire explosion as a source of underwater shock waves

Shi¹,

Yin²,

Li³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…ALEGRA is equipped to handle -and has been used successfully for -a much broader class of problems. 10,[12][13][14] These include deforming solid and hydrodynamic media, mechanical and electromagnetic forces, and adiabatic and Ohmic sources of heating, via its "magnetohydrodynamics" (MHD) module. The MHD physics module couples the transient magnetics capabilities with the continuum mechanics capabilities that form ALEGRA's basis, enhanced to incorporate electromagnetic induction and conservation of magnetic flux.…”

Section: Alegra Formulationmentioning

confidence: 99%

Using the ALEGRA Code for Analysis of Quasi-Static Magnetization of Metals

Grinfeld¹,

Niederhaus²,

Porwitzky³

2015

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.

show abstract

“…More accurate description of UEWE process can be realized by magnetohydrodynamic (MHD) models. Many research institutions including Israel Institute of Technology [18], Imperial College London [19], Institute of High Current Electronics [20], Seoul National University [21], Tsinghua University [22] and Xi'an Jiaotong University [23,24] have developed their own MHD codes; general-purpose MHD codes such as JULIA [25] and ALEGRA [26] were also used to study the UEWE process. Generally speaking, previous studies were usually focused on the exploding wire, for example, to test the accuracy of metal equation of states (EOSs) and conductivity data, to clarify the evolution of the wire state and instabilities, etc, and few on SW characteristics.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional simulation of microsecond-timescale underwater electrical explosion of a copper wire

Shi¹,

Li²,

Hu³

et al. 2022

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Underwater electrical wire explosion (UEWE) is an efficient source of underwater shock waves (SWs). In order to efficiently simulate the interaction between the UEWE SW and structures, a coupled model that includes the electric circuit, the exploding wire and the surrounding water is established based on user-subroutines provided by the commercial explicit dynamics software ANSYS AUTODYN. The modeling starts from room temperature by using the tabular wide-range metal equation of state (EOS) and conductivity data. Experimental validation is performed with copper wires exploded by a μs-timescale pulsed discharge. The numerical results show satisfactory consistency with experiments in terms of the current and voltage waveforms, the wire expansion trajectory, the evolution of SW front, the interaction between SW and electrodes and the SW pressure profiles. The main discrepancy lies in the SW amplitude that is ~20% higher in the calculation and the possible reasons are discussed in detail. Based on this approach and with proper modifications to the metal EOS and conductivity data, the interaction between UEWE SWs and structures can be efficiently modeled in 2D and 3D for practical applications.

show abstract

Experiments and Simulations of Exploding Aluminum Wires: Validation of ALEGRA-MHD

Cited by 5 publications

References 18 publications

Electrical wire explosion as a source of underwater shock waves

Electrical wire explosion as a source of underwater shock waves

Using the ALEGRA Code for Analysis of Quasi-Static Magnetization of Metals

Two-dimensional simulation of microsecond-timescale underwater electrical explosion of a copper wire

Contact Info

Product

Resources

About