Three-dimensional simulation of high-frequency nonlinear internal wave dynamics in Cayuga Lake

A three-dimensional (3D) ocean environment is assimilated with measured ocean data in the ASIAEX SCS (Asian Seas International Acoustics EXperiment, South China Sea) experiment. The experiment site is characterized as an active internal wave propagation region along the Northwestern shelf break of the South China Sea. Three-dimensional acoustics effects in the area are studied using FOR3DW, a wide-angle version of the parabolic equation code FOR3D (a Finite difference solution, an Ordinary differential equation, and Rational function approximations for solving 3D problems), and MOS3DPEF (MOdal Spectrum analysis based on 3D PE Field). The TL comparison between Nx2D and 3D calculations are shown to demonstrate the 3D effects. Variations in topography of the shelf break and in the water column due to the internal waves cause the 3D effects in the acoustic field. The intercomparison of the importance of bottom steering 3D effects and nonlinear internal wave refraction 3D effects is therefore proposed to realize which possesses the major part of the 3D effects. Also, 3D modal analysis results show that the nonlinear internal wave front causes severe horizontal refraction for higher modes.

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THREE-DIMENSIONAL ACOUSTIC SIMULATION ON ACOUSTIC SCATTERING BY NONLINEAR INTERNAL WAVE IN COASTAL OCEAN

Theoretical and Computational Acoustics 2005 ◽

10.1142/9789812772602_0004 ◽

2006 ◽

Author(s):

LINUS Y. S. CHIU ◽

CHI-FANG CHEN ◽

JAMES F. LYNCH

Keyword(s):

Internal Wave ◽

Three Dimensional ◽

Acoustic Scattering ◽

Coastal Ocean ◽

Nonlinear Internal Wave ◽

Acoustic Simulation

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Mean flow generation by three-dimensional nonlinear internal wave beams

Journal of Fluid Mechanics ◽

10.1017/jfm.2019.22 ◽

2019 ◽

Vol 864 ◽

pp. 303-326 ◽

Cited By ~ 2

Author(s):

F. Beckebanze ◽

K. J. Raja ◽

L. R. M. Maas

Keyword(s):

Internal Wave ◽

Three Dimensional ◽

Theoretical Expression ◽

Mean Flow ◽

Production Term ◽

Nonlinear Internal Wave ◽

Vertical Vorticity ◽

Flow Generation ◽

The Mean ◽

Vorticity Production

We study the generation of resonantly growing mean flow by weakly nonlinear internal wave beams. With a perturbational expansion, we construct analytic solutions for three-dimensional internal wave beams, exact up to first-order accuracy in the viscosity parameter. We specifically focus on the subtleties of wave beam generation by oscillating boundaries, such as wave makers in laboratory set-ups. The exact solutions to the linearized equations allow us to derive an analytic expression for the mean vertical vorticity production term, which induces a horizontal mean flow. Whereas mean flow generation associated with viscous beam attenuation – known as streaming – has been described before, we are the first to also include a peculiar inviscid mean flow generation in the vicinity of the oscillating wall, resulting from line vortices at the lateral edges of the oscillating boundary. Our theoretical expression for the mean vertical vorticity production is in good agreement with earlier laboratory experiments, for which the previously unrecognized inviscid mean flow generation mechanism turns out to be significant.

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Dynamic three dimensional simulation of wire bonding processes on soft polymeric substrates for high frequency applications

2012 4th Electronic System-Integration Technology Conference ◽

10.1109/estc.2012.6542105 ◽

2012 ◽

Cited By ~ 1

Author(s):

F. Kraemer ◽

P. Ritter ◽

M. Moller ◽

S. Wiese

Keyword(s):

High Frequency ◽

Three Dimensional ◽

Wire Bonding ◽

Dimensional Simulation ◽

Polymeric Substrates

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THREE-DIMENSIONAL ACOUSTIC SIMULATION OF AN ACOUSTIC REFRACTION BY A NONLINEAR INTERNAL WAVE IN A WEDGE BATHYMETRY

Journal of Computational Acoustics ◽

10.1142/s0218396x1000419x ◽

2010 ◽

Vol 18 (03) ◽

pp. 279-296 ◽

Cited By ~ 2

Author(s):

LINUS Y. S. CHIU ◽

ANDREA Y. Y. CHANG ◽

CHI-FANG CHEN ◽

RUEY-CHANG WEI ◽

YING-JANG YANG ◽

...

Keyword(s):

Internal Wave ◽

Transmission Loss ◽

Three Dimensional ◽

Joint Effect ◽

Acoustic Mode ◽

Acoustic Energy ◽

Acoustic Effect ◽

Nonlinear Internal Wave ◽

Mode Amplitude ◽

Whispering Gallery

Nonlinear internal wave (NIW) results in three dimensional acoustic effect such as ducting and whispering gallery effects in acoustic propagation. Acoustic energy restricted within internal wave crests (crest–crest) on the shelf constitutes the ducting effect, and energy confined along the crest when the source is located upslope from the NIW crest is known as the whispering gallery effect. Numerical experiments are presented in this paper for the study of 3D acoustic effects caused by both internal wave and wedge-bathymetry. 3D effects are predicted by Wide-Angle-FOR3D and the modal contents are calculated by MOS3DPEF. Following are the case studies detailing differences between 2D and 3D calculation, and the joint effect of propagating internal waves with upslope-bathymetry. Modeled time series of transmission Loss reveal that internal wave induces the oceanic waveguide and concentrate acoustic energy along the wave front. By modeling larger calculation ranges (20 km) and deeper deploying sources, the changing of the growth and decline of acoustic energy and lower acoustic mode amplitude by range, along the front of internal wave can be observed in this paper.

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