scholarly journals Wave focusing and related multiple dispersion transitions in plane Poiseuille flows

2021 ◽  
Vol 33 (3) ◽  
pp. 034101
Author(s):  
F. Fraternale ◽  
G. Nastro ◽  
D. Tordella
Keyword(s):  
Wave Focusing ◽  
Poiseuille Flows

Guided Wave Focusing Mechanics in Pipe

2003 ◽  
Author(s):  
Takahiro Hayashi ◽  
Koichiro Kawashima ◽  
Zongqi Sun ◽  
Joseph L. Rose
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Guided Waves ◽  
Wave Structure ◽  
Guided Wave ◽  
Pipe Inspection ◽  
Specific Point ◽  
Wave Focusing ◽  
Beam Focusing ◽  
Subsequent Time

Guided waves can be used in pipe inspection over long distances. Presented in this paper is a beam focusing technique to improve the S/N ratio of the reflection from a tiny defect. Focusing is accomplished by using non-axisymmetric waveforms and subsequent time delayed superposition at a specific point in a pipe. A semi-analytical finite element method is used to present wave structure in the pipe. Focusing potential is also studied with various modes and frequencies.

Microjetting from wave focusing on oscillating drops

2007 ◽  
Vol 19 (5) ◽  
pp. 052101 ◽  
Author(s):  
S. T. Thoroddsen ◽  
T. G. Etoh ◽  
K. Takehara
Keyword(s):  
Wave Focusing

Laser induced short plane acoustic wave focusing in water

2007 ◽  
Vol 91 (5) ◽  
pp. 051128 ◽  
Author(s):  
Seung H. Ko ◽  
Sang G. Ryu ◽  
Nipun Misra ◽  
Heng Pan ◽  
Costas P. Grigoropoulos ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Wave Focusing ◽  
Plane Acoustic Wave

Internal wave focusing revisited; a reanalysis and new theoretical links

2008 ◽  
Vol 40 (2) ◽  
pp. 95-122 ◽  
Author(s):  
Frans-Peter A Lam ◽  
Leo R M Maas
Keyword(s):  
Internal Wave ◽  
Wave Focusing

scholarly journals Closed loop control of vibration field transient: Application to wave focusing

2022 ◽  
Vol 167 ◽  
pp. 108285
Author(s):  
Anis Kaci ◽  
Christophe Giraud-Audine ◽  
Frédéric Giraud ◽  
Michel Amberg ◽  
Betty Lemaire-Semail
Keyword(s):  
Closed Loop ◽  
Closed Loop Control ◽  
Wave Focusing ◽  
Loop Control ◽  
Vibration Field
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