Direct (phase-resolving) model of surface waves

Abstract

The place of the numerical model of surface waves TRIDWAVE, created in the St. Petersburg Branch of IO RAS, in computational geophysical fluid dynamics is discussed. A description of the mathematical formulation and numerical models of surface waves in the periodic domain for infinite depth is given. The main feature of the model is the ability to switch from a detailed three-dimensional scheme to a simplified two-dimensional scheme, which speeds up calculations by 10–15 times. The statistical characteristics of the results reproduced by the original and accelerated versions of the model coincide with high accuracy. A description is given of the structure of the model, the interaction of its blocks, the scheme for starting and resuming computations and monitoring the results. The dynamic part of the program is described, which carries out the solution at each time step and blocks of operational processing and recording of results that are activated upon request. The system for recording results, their composition is described, and recommendations for expanding the output are given. Recommendations are given for organizing the processing of the results obtained after the end of the calculation.