Reply To: Phase error of Global Z force

[Yu Bi]

Hi, for incident wave pressure, it has zero phase angle compared to the wave elevation. Regarding phase angle, I mean the one explained in Aqaw Theory Manual Section 1.3. From Equation (2.1), (2.2) and (4.4) in Aqwa Theory Manual, you can see there is no phase difference between the incident wave pressure and wave surface elevation. So, in your first graph, the incident pressure is the smallest while the wave elevation reaches the trough, and in your second graph, the incident pressure is the largest while the wave elevation reaches the crest.