Features of fluid flows in strongly nonlinear internal solitary waves
S. Semin1, O. Kurkina1, A. Kurkin1, T. Talipova1,2, E. Pelinovsky1,2,3, and E. Churaev11Nizhny Novgorod State Technical University n.a. R. Alekseev, Nizhny Novgorod, Russia 2Institute of Applied Physics, Nizhny Novgorod, Russia 3National Research University – Higher School of Economics, Moscow, Russia
Received: 30 Nov 2014 – Accepted for review: 02 Dec 2014 – Discussion started: 18 Dec 2014
Abstract. The characteristics of highly nonlinear solitary internal waves (solitons) are calculated within the fully nonlinear numerical model of the Massachusetts Institute of Technology. The verification and adaptation of the model is based on the data from laboratory experiments. The present paper also compares the results of our calculations with the calculations performed in the framework of the fully nonlinear Bergen Ocean Model. The comparison of the computed soliton parameters with the predictions of the weakly nonlinear theory based on the Gardner equation is given. The occurrence of reverse flow in the bottom layer directly behind the soliton is confirmed in the numerical simulations. The trajectories of Lagrangian particles in the internal soliton on the surface, on the pycnocline and near the bottom are computed.
Semin, S., Kurkina, O., Kurkin, A., Talipova, T., Pelinovsky, E., and Churaev, E.: Features of fluid flows in strongly nonlinear internal solitary waves, Nonlin. Processes Geophys. Discuss., 1, 1919-1946, doi:10.5194/npgd-1-1919-2014, 2014.