Title of article :
Nonlinear wave–wave interactions in stratified flows: Direct numerical simulations
Author/Authors :
Lvov، نويسنده , , Yuri V. and Yokoyama، نويسنده , , Naoto، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2009
Pages :
13
From page :
803
To page :
815
Abstract :
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 dynamical equations only wave modes are retained, and vortices and horizontally uniform vertical shears are excluded. Despite the simplifications, our simulations reproduce some key features of oceanic internal-wave spectra: accumulation of energy at near-inertial waves and realistic frequency and horizontal wavenumber dependencies. Furthermore, we provide evidence that formation of the energy spectra in the inertial subrange is dominated by scale-separated interactions with the near-inertial waves. These findings support observationally based intuition that spectral energy density of internal waves is the result of predominantly wave–wave interactions.
Keywords :
gravity waves , SIMULATION , Stratified flows
Journal title :
Physica D Nonlinear Phenomena
Serial Year :
2009
Journal title :
Physica D Nonlinear Phenomena
Record number :
1728992
Link To Document :
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