A numerical model for the electrical and shock wave characteristics of underwater pulsed spark discharge

Underwater pulsed spark discharge has been widely used in industrial fields as a source of shock waves or acoustic waves, and numerical modeling of the discharge and pressure wave characteristics is necessary to improve the application performance. In this paper, a numerical model is proposed that c...

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Bibliographic Details
Published in:Journal of applied physics 2024-01, Vol.135 (3)
Main Authors: Li, Xin, Shi, Huantong, Hu, Jinliang, Wu, Jian, Li, Xingwen, Qiu, Aici
Format: Article
Language:English
Subjects:
Acoustic waves
Applied physics
Circuits
Conservation equations
Elastic waves
Electric sparks
Energy flow
Equations of state
Mathematical models
Numerical models
Shock waves
Thermal radiation
Underwater
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Summary:Underwater pulsed spark discharge has been widely used in industrial fields as a source of shock waves or acoustic waves, and numerical modeling of the discharge and pressure wave characteristics is necessary to improve the application performance. In this paper, a numerical model is proposed that couples the circuit equation, the mass and energy conservation equations, and a momentum conservation equation based on the Rankine–Hugoniot conditions. A tabulated wide range equation of state and conductivity data of water are used, and various physical processes during the plasma channel expansion are considered, including the energy flow and mass exchange between the channel and the surrounding water due to thermal radiation, evaporation, and condensation. The model self-consistently solves the circuit current and voltage, the plasma channel parameters including composition, temperature, conductivity, pressure, etc., and the pressure profile at a certain distance from the discharge channel. The calculated results show good consistency with the experimental measurements, and three sets of experimental results from other literature are tested to further verify the applicability and effectiveness of the model.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0187919