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Spatiotemporal dynamics of underwater conical shock wave focusing

Shock Waves, ISSN: 0938-1287, Vol: 27, Issue: 4, Page: 685-690
2017
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Article Description

The paper presents an experimental study on spatiotemporal dynamics of conical shock waves focusing in water. A multichannel pulsed electrohydraulic discharge source with a cylindrical ceramic-coated electrode was used. Time-resolved visualizations revealed that cylindrical pressure waves were focused to produce conical shock wave reflection over the axis of symmetry in water. Positive and negative pressures of 372 MPa and - 17 MPa at the focus with 0.48 mm lateral and 22 mm axial extension (- 6 dB) were measured by a fiber-optic probe hydrophone. The results clearly show the propagation process leading to the high-intensity underwater shock wave. Such strong and sharp shock wave focusing offers better localization for extracorporeal lithotripsy or other non-invasive medical shock wave procedures.

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