TY - GEN
T1 - Mechanistic study of upper ocean turbulence interacting with surface waves
AU - Guo, Xin
AU - Yang, Di
AU - Liu, Yi
AU - Shen, Lian
PY - 2010
Y1 - 2010
N2 - We perform direct numerical simulations to simulate the interaction between surface waves and the turbulence underneath. The Navier-Stokes equations are simulated using a pseudospectral method in horizontal directions and a finite-difference method in vertical direction, with fully nonlinear viscous freesurface kinematic and dynamic boundary conditions at the free surface. We set up the turbulence and the waves by a random forcing method in the bulk flow and a pressure forcing method at the surface, which were recently developed by [1]. It is found that there are surface waves generated on the free surface due to the excitation by the turbulence. The surface elevation is sensitive to the effect of gravity and surface tension. In the presence of progressive waves at the free surface, the turbulent vortical structure is turned, stretched, and compressed periodically by the strain field of waves.
AB - We perform direct numerical simulations to simulate the interaction between surface waves and the turbulence underneath. The Navier-Stokes equations are simulated using a pseudospectral method in horizontal directions and a finite-difference method in vertical direction, with fully nonlinear viscous freesurface kinematic and dynamic boundary conditions at the free surface. We set up the turbulence and the waves by a random forcing method in the bulk flow and a pressure forcing method at the surface, which were recently developed by [1]. It is found that there are surface waves generated on the free surface due to the excitation by the turbulence. The surface elevation is sensitive to the effect of gravity and surface tension. In the presence of progressive waves at the free surface, the turbulent vortical structure is turned, stretched, and compressed periodically by the strain field of waves.
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U2 - 10.1115/OMAE2010-20613
DO - 10.1115/OMAE2010-20613
M3 - Conference contribution
AN - SCOPUS:80054006899
SN - 9780791849118
T3 - Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
SP - 721
EP - 727
BT - ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010
T2 - ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering, OMAE2010
Y2 - 6 June 2010 through 11 June 2010
ER -