Spatiotemporal dynamics of underwater conical shock wave focusing

0476025 - ÚFP 2018 RIV US eng J - Journal Article
Hoffer, Petr - Lukeš, Petr - Akiyama, H. - Hosseini, H.
Spatiotemporal dynamics of underwater conical shock wave focusing.
Shock Waves. Roč. 27, č. 4 (2017), s. 685-690. ISSN 0938-1287. E-ISSN 1432-2153
Grant - others:Rada Programu interní podpory projektů mezinárodní spolupráce AV ČR(CZ) M100431203
Program: M
Institutional support: RVO:61389021
Keywords : Underwater shock wave focusing * multichannel * electrohydraulic discharge * conical shock wave reflection * medical application
OECD category: Applied mechanics
Impact factor: 1.504, year: 2017
https://link.springer.com/article/10.1007/s00193-016-0703-7

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 highintensity underwater shock wave. Such strong and sharp shock wave focusing offers better localization for extracorporeal lithotripsy or other non-invasive medical shock wave procedures.
Permanent Link: http://hdl.handle.net/11104/0272605