Yuri V. Lvov, Kurt L. Polzin, Esteban G. Tabak, Naoto Yokoyama

Journal of Physical Oceanography 40 2605-2623 Dec 2010

Steady scale-invariant solutions of a kinetic equation describing the statistics of oceanic internal gravity waves based on wave turbulence theory are investigated. It is shown in the nonrotating scale-invariant limit that the collision integral i...

Physica D: Nonlinear Phenomena 238 803-815 May 2009

To investigate the formation mechanism of energy spectra of internal waves in the oceans, direct numerical simulations are performed. The simulations are based on the reduced dynamical equations of rotating stratified turbulence. In the reduced dy...

We perform direct numerical simulations of dynamic equations of decaying gravity waves on infinite-depth water. Power-law behaviour of the wave action spectrum and structure functions of the surface elevation is obtained. These power laws agree wi...

The effects of discretization of the spectrum on the evolution of weak turbulence of surface gravity waves are investigated by direct numerical simulations. Discretization of the spectrum is implemented by imposing periodic boundary conditions on ...

Kei Senda, Naoto Yokoyama, Koji Yokoi, Masahiko Kitamura

Proceedings of the IASTED International Conference on Modelling, Simulation, and Identification, MSI 2011 428-435 Dec 2011

The objective of this study is to clarify the effects of structural flexibility of wings in flapping butterflies. The flapping butterflies are observed in the experiments, and they are compared with the dynamical model that is a rigid multi-body s...