Faculty of Physics
M.V.Lomonosov Moscow State University

Generation of long waves during the movement of a submarine landslide body and wave resistance force

M. V. Lebkov

Memoirs of the Faculty of Physics 2023. N 4.

  • Article

Within the framework of the linear theory of long waves, on the basis of an accurate analytical solution of a one-dimensional problem, the features of the generation of gravitational surface waves during the movement of a non-deformable landslide body are investigated. Explicit expressions describing the energy of the waves, as well as the strength of the wave resistance, are obtained. It is established that the pumping of energy to the waves, and, consequently, the action of the wave resistance force, is limited in time. It is shown that the calculation of the wave resistance force by the instantaneous parameters of the body motion is impossible due to the fact that the magnitude of this force is determined by the prehistory of the movement of the landslide body. Estimates of the magnitude of the wave resistance force suggest that it can be comparable to the forces of "dry" and turbulent friction.

Received: 2023 June 23
Approved: 2023 August 28
91.30.Nw Tsunamis
M. V. Lebkov
$^1$Physics Faculty of M.V. Lomonosov Moscow State University
Issue 4, 2023

Moscow University Physics Bulletin

Science News of the Faculty of Physics, Lomonosov Moscow State University

This new information publication, which is intended to convey to the staff, students and graduate students, faculty colleagues and partners of the main achievements of scientists and scientific information on the events in the life of university physicists.