Linear wave transformation in an inhomogeneous anisotropic medium (?quasidegenerate? geometric-optics approximation)

1976 ◽  
Vol 19 (9) ◽  
pp. 910-916
Author(s):  
L. A. Apresyan ◽  
Yu. A. Kravtsov ◽  
Yu. Ya. Yashin ◽  
V. A. Yashnov
Keyword(s):  
Anisotropic Medium ◽  
Wave Transformation ◽  
Linear Wave ◽  
Geometric Optics ◽  
Inhomogeneous Anisotropic Medium

The coastal refraction-diffraction wave propagation model

1995 ◽  
Vol 17 (4) ◽  
pp. 6-12
Author(s):  
Nguyen Tien Dat ◽  
Dinh Van Manh ◽  
Nguyen Minh Son
Keyword(s):  
Wave Propagation ◽  
Field Data ◽  
Surf Zone ◽  
Propagation Model ◽  
Wave Transformation ◽  
Diffraction Effect ◽  
Linear Wave ◽  
Diffraction Wave ◽  
Linear Wave Propagation ◽  
Wave Propagation Model

A mathematical model on linear wave propagation toward shore is chosen and corresponding software is built. The wave transformation outside and inside the surf zone is considered including the diffraction effect. The model is tested by laboratory and field data and gave reasonables results.

scholarly journals DEPENDENCIES OF BREAKING TYPE, BREAKING CRITERIA AND ENERGY DISSIPATION ON AMPLITUDE-PHASE FREQUENCY STRUCTURE OF WAVES

2018 ◽  
pp. 72
Author(s):  
Sergey Kuznetsov ◽  
Yana Saprykina ◽  
Valentina Volkova
Keyword(s):  
Wave Energy ◽  
Wave Breaking ◽  
Dissipation Rate ◽  
Vertical Axis ◽  
Breaking Waves ◽  
Horizontal Axis ◽  
Wave Transformation ◽  
Linear Wave ◽  
Frequency Range ◽  
Nonlinear Harmonics

Type of wave breaking - plunging or spilling - depends on symmetry of waves. The spilling waves are asymmetric against horizontal axis and are practically symmetric against vertical axis so the phase shift between first and second nonlinear harmonics (or biphase) is close to zero. The plunging breaking waves have larger asymmetry against vertical axis, (biphase is close to -pi/2), and near symmetric on horizontal axis (close to saw-toothed form). Non-linear wave transformation influences on depth-induced wave breaking. Breaking index depends on relation of wave energy in frequency range of second nonlinear harmonics to wave energy in frequency range of main harmonic and on biphase. The dissipation rate of spilling breaking waves energy quadratically depends on frequency, while in plunging breaking, this dependency is practically linear for all frequencies.

Dislocations in an inhomogeneous anisotropic medium

1968 ◽  
Vol 18 (9) ◽  
pp. 1085-1093 ◽  
Author(s):  
J. Gemperlová ◽  
I. Saxl
Keyword(s):  
Anisotropic Medium ◽  
Inhomogeneous Anisotropic Medium

Gekoppelte Wellengleichungen für inhomogene anisotrope Medien

1954 ◽  
Vol 9 (7-8) ◽  
pp. 630-636
Author(s):  
Kurt Suchy
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Anisotropic Medium ◽  
Wave Equations ◽  
Electromagnetic Wave Propagation ◽  
Inhomogeneous Anisotropic Medium ◽  
Special System ◽  
Coupled Wave Equations ◽  
Coupling Terms ◽  
Wave Normal

A special system of coordinates has been introduced for the calculation of electromagnetic wave propagation in an inhomogeneous, anisotropic medium. One of the coordinate axes is parallel to the wave normal, the two others (perpendicular to it) are defined by the relation between the E and D̃ vector. In the coupled wave equations it is shown that the coupling terms can be neglected under certain conditions.

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