To understand the formation mechanism of the shock waves(SWs)generated by underwater electrical wire explosion(UEWE)
double artificial viscosities are introduced to establish one-dimensional simulation model for SWs by UEWE based on classic piston model and similarity parameter method. In this simulation the trajectory of the discharge plasma channel(DPC)boundary serves as the unique input parameter
water pressure and SW velocity versus the distance from exploding wire and the period from exploding moment are obtained. The calculated results are compared with the experimental values from the other literatures to confirm the validity. The SWs calculated with double artificial viscosities method coincide well with the practical situation. At the explosion beginning the SW pressure reaches the grade of GPa at the DPC boundary
the obtained pressure amplitudes of SWs are found to be in direct proportion to the -0.7 power of radial propagation distance. The calculating method does not involve the complicated processes of pulse discharge
physical changes of DPC
and physical-chemistry interaction between DPC and water
only the DPC boundary trajectory obtained by experimental diagnostics is taken to simulate the generation and propagation processes of SWs generated by UEWE.
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references
CHO C, CHOI Y W, KANG C, et al. Effects of the medium on synthesis of nanopowders by wire explosion process [J]. Applied Physics Letters, 2007, 91(14): 141501.
TKACHENKO S I, ROMANOVA V M, MINGALEEV A R, et al. Study of plasma parameter's distribution upon electrical wire explosion [J]. European Physical Journal: D, 2009, 54(2): 335-341.
ZHU Jun, JIANG Xiaoguo, CHEN Nan. High intensity electron beam as a tool for warm dense matter studies [J]. High Power Laser and Particle Beam, 2013(1): 99-103.
GRINENKO A, GUROVICH V T, KRASIK Y E, et al. Addressing water vaporization in the vicinity of an exploding wire [J]. Journal of Applied Physics, 2006, 100(11): 113309.
GRINENKO A, SAYAPIN A, GUROVICH V T, et al. Underwater electrical explosion of a Cu wire [J]. Journal of Applied Physics, 2005, 97(2): 023303.
SHEFTMAN D, SHAFER D, EFIMOV S, et al. Evaluation of electrical conductivity of Cu and Al through sub microsecond underwater electrical wire explosion [J]. Physics of Plasmas, 2012, 19(3): 034501.
ORESHKIN V I, CHAIKOVSKY S A, RATAKHIN N A, et al. “Water bath” effect during the electrical underwater wire explosion [J]. Physics of Plasmas, 2007, 14(10): 102703.
VEKSLER D, SAYAPIN A, EFIMOV S, et al. Characterization of different wire configurations in underwater electrical explosion [J]. IEEE Transactions on Plasma Science, 2009, 37(1): 88-98.
张鸣远, 景思睿, 李国君. 高等工程流体力学 [M]. 西安: 西安交通大学出版社, 2006: 335.[10] LASTMAN G J, WENTZELL R A. Comparison of five models of spherical bubble response in an inviscid compressible liquid [J]. The Journal of the Acoustical Society of America, 1981, 69(3): 638-642.
汤文辉. 冲击波物理 [M]. 北京: 科学出版社, 2011: 104.
VONNEUMANN J, RICHTMYER R D. A method for the numerical calculation of hydrodynamic shocks [J]. Journal of Applied Physics, 1950, 21(3): 232-237.
FEDOTOV-GEFEN A, EFIMOV S, GILBURD L, et al. Generation of a 400 GPa pressure in water using converging strong shock waves [J]. Physics of Plasmas, 2011, 18(6): 062701.
SAYAPIN A, GRINENKO A, EFIMOV S, et al. Comparison of different methods of measurement of pressure of underwater shock waves generated by electrical discharge [J]. Shock Waves, 2006, 15(2): 73-80.
LANDAU L D, LIFSHITZ E M. Fluid mechanics [M]. 2nd ed. Oxford UK: Pergamon Press, 1987: 271-273.