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WRC
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 LABORATORY OF LASER WAVEMETRY |
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Theoretical and numerical modeling of wave processes in
the upper layer of the Ocean and atmosphere, nonlinear aspects of surface
wave propagation and wave interactions with large-scale currents are carried
out in the laboratory. New methods of laser and radar remote sensing of
the sea surface are being developed. Fluid motions in channels and porous
media are studied for a various deformable types of solid boundaries.
P. V. Grigoriev, Ph.D.
A. M. Lomonosov
M. L. Lyamshev, Ph.D.
Prof. V. G. Mikhalevich,
D.Sc. D. Yu. Tsipenyuk,
Ph.D. A. M. Shermenev,
Ph.D. M. A. Shermeneva
The laboratory is headed by I. V. Shugan, D.Sc.
Nonlinear propagation of surface wave packets with deep modulations
of frequency and wave-number;
Surface wave interaction with large scale currents and nonuniform bottom
topography;
Swell propagation in the beach zone and characteristics of runup;
Remote sensing of the sea surface by laser and radar techniques and
theoretical modeling;
Investigation of liquid flows in channels with oscillating boundaries
and porous media;
Analytical and numerical modeling of mass transfer by sand storms and
dynamics of sand-bars.
A nonlinear model of surface wave packets with deep modulation of
local frequency and wave number is developed. It explains the results
of experiments on nonlinear propagation of surface waves;
Interaction between nonlinear surface waves and large scale internal
waves is analyzed. Uniformly valid description of modulations was developed
at the conditions close to group synchronism. Limiting conditions for
existence of connected surface waves accompanying an internal wave are
obtained;
A new methodology for the remote sensing of the sea surface by a narrow
beam of a CW laser is developed and implemented. Statistical analysis
of quasi-mirror reflections from the sea surface provides rich information
on the energy spectrum of a random moving sea surface.
Wave processes at the beach zone in the case of variable topography
are analyzed on the basis of the developed highly precise "shallow
water" model and the characteristics of runup are revealed.
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