Numerical simulation of second-order stokes wave generation and propagation in a two-dimensional CFD wave flume
Liuhe Duan
Power China Huadong Engineering Corporation Limited
Baihuan Sun
Power China Huadong Engineering Corporation Limited
Jie He
Power China Huadong Engineering Corporation Limited
DOI: https://doi.org/10.59429/pest.v8i3.15414
Keywords: numerical wave flume; second-order stokes wave; volume of fluid; wave generation; wave damping
Abstract
A two-dimensional computational wave flume was developed in ANSYS Fluent to examine the generation, propagation, and attenuation of regular waves imposed through a second-order Stokes inlet condition. The air-water interface was captured with the volume-of-fluid (VOF) method, and a downstream momentum-damping zone was used to reduce outlet reflection. The 120 m long, 9 m high flume had a still-water depth of 5 m and was discretized with 17,280 structured quadrilateral cells refined near the mean free surface. For a nominal wave height of 0.50 m and period of 2.50 s, the wave-gauge records exhibited a stable dominant period of approximately 2.5-2.6 s. The developed wave height was approximately 0.42- 0.48 m at x = 5-15 m but decreased to 0.14-0.16 m at x = 95 m, corresponding to a reduction of about 60- 70%. These results demonstrate stable temporal periodicity near the inlet but also substantial downstream attenuation. Consequently, grid/time-step convergence, analytical or experimental validation, and a quantitative reflection analysis are required before the model is used for wave-load prediction.
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