Applying and Assessing the Performance of Projection Method in External Mode of Princeton Ocean Model by Simulating Tidal Currents in the Persian Gulf

This study focused on improving the Princeton Ocean Model (POM) by proposing and implementing a new algorithm for its external mode, which solves depth-averaged two-dimensional equations of continuity and momentum transport. The goal of the new algorithm was to reduce the numerical diffusion of the model and enable the use of larger time steps for calculations. To achieve this, the Projection method was used along with the implicit discontinuity of the gravity terms in the governing equations of the two-dimensional solution of the model. The new algorithm was then evaluated for its efficiency in simulating tidal currents in the Persian Gulf. The results of the modified model were compared with those of the original model, as well as tidal fluctuations measured at several tidal stations in the Persian Gulf. The comparison showed that the modified algorithm successfully reduced the calculation time while increasing the accuracy and reducing numerical diffusion in the results.